序号 | 可达集合 | 先行集合 | 可达集合与先行集合的交集 | 抽取要素 |
层级 1 |
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A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T |
A |
1 |
1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
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1 |
B |
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1 |
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1 |
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C |
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1 |
1 |
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1 |
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1 |
D |
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1 |
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E |
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1 |
1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
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1 |
F |
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1 |
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1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
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1 |
G |
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1 |
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H |
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1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
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1 |
I |
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1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
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1 |
J |
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1 |
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K |
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1 |
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1 |
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L |
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1 |
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1 |
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1 |
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1 |
M |
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1 |
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1 |
1 |
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1 |
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1 |
N |
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1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
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1 |
O |
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1 |
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1 |
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P |
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1 |
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1 |
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1 |
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Q |
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1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
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1 |
R |
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1 |
1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
1 |
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1 |
S |
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1 |
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T |
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1 |
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1 |
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1 |
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A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T |
A |
1 |
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B |
1 |
1 |
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1 |
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1 |
1 |
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|
1 |
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1 |
1 |
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C |
1 |
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1 |
|
1 |
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1 |
1 |
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|
1 |
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1 |
1 |
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D |
1 |
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1 |
1 |
1 |
1 |
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1 |
1 |
|
|
1 |
1 |
1 |
1 |
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1 |
1 |
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1 |
E |
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1 |
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F |
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1 |
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G |
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1 |
1 |
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1 |
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1 |
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H |
1 |
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1 |
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1 |
1 |
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1 |
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1 |
1 |
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I |
1 |
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1 |
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1 |
1 |
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1 |
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1 |
1 |
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J |
1 |
1 |
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1 |
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1 |
1 |
1 |
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1 |
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1 |
1 |
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K |
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1 |
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1 |
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1 |
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L |
1 |
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1 |
1 |
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1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
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M |
1 |
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1 |
1 |
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1 |
1 |
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1 |
1 |
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1 |
1 |
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N |
1 |
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1 |
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1 |
1 |
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1 |
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1 |
1 |
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O |
1 |
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1 |
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1 |
1 |
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1 |
1 |
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1 |
1 |
1 |
1 |
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1 |
1 |
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1 |
P |
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1 |
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1 |
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Q |
1 |
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1 |
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1 |
1 |
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1 |
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1 |
1 |
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R |
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1 |
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S |
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1 |
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T |
1 |
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1 |
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1 |
1 |
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1 |
1 |
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1 |
1 |
1 |
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1 |
1 |
|
1 |
|
|
A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
R |
S |
T |
A |
1 |
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B |
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1 |
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C |
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1 |
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D |
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1 |
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E |
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1 |
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F |
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1 |
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G |
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|
1 |
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H |
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1 |
1 |
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1 |
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1 |
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I |
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1 |
1 |
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1 |
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1 |
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J |
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1 |
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K |
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|
1 |
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|
L |
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1 |
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M |
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|
1 |
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|
N |
|
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|
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1 |
1 |
|
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|
1 |
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|
1 |
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|
O |
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|
1 |
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P |
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1 |
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Q |
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1 |
1 |
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|
1 |
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1 |
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|
R |
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1 |
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S |
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1 |
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T |
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1 |
| 抽取了要素: A E F R S
|
层级 2 |
|
B | C | D | G | H | I | J | K | L | M | N | O | P | Q | T |
B |
1 |
|
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|
1 |
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C |
|
1 |
1 |
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|
1 |
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|
1 |
D |
|
|
1 |
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G |
|
|
|
1 |
|
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|
|
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|
|
H |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
I |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
J |
|
|
|
|
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|
1 |
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|
K |
|
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|
1 |
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|
1 |
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|
L |
|
|
1 |
|
|
|
|
|
1 |
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|
1 |
|
|
1 |
M |
|
|
1 |
|
|
|
|
|
1 |
1 |
|
1 |
|
|
1 |
N |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
O |
|
|
1 |
|
|
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|
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|
1 |
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|
P |
|
|
|
1 |
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|
1 |
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|
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|
1 |
|
|
Q |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
T |
|
|
1 |
|
|
|
|
|
|
|
|
1 |
|
|
1 |
|
|
B | C | D | G | H | I | J | K | L | M | N | O | P | Q | T |
B |
1 |
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
C |
|
1 |
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
D |
|
1 |
1 |
|
1 |
1 |
|
|
1 |
1 |
1 |
1 |
|
1 |
1 |
G |
|
|
|
1 |
|
|
|
1 |
|
|
|
|
1 |
|
|
H |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
I |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
J |
1 |
|
|
|
1 |
1 |
1 |
|
|
|
1 |
|
|
1 |
|
K |
|
|
|
|
|
|
|
1 |
|
|
|
|
1 |
|
|
L |
|
|
|
|
1 |
1 |
|
|
1 |
1 |
1 |
|
|
1 |
|
M |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
|
|
1 |
|
N |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
O |
|
1 |
|
|
1 |
1 |
|
|
1 |
1 |
1 |
1 |
|
1 |
1 |
P |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
Q |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
T |
|
1 |
|
|
1 |
1 |
|
|
1 |
1 |
1 |
|
|
1 |
1 |
|
|
B |
C |
D |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
T |
B |
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
C |
|
1 |
|
|
|
|
|
|
|
|
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|
|
|
|
D |
|
|
1 |
|
|
|
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|
G |
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
H |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
I |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
J |
|
|
|
|
|
|
1 |
|
|
|
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|
|
|
|
K |
|
|
|
|
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|
|
1 |
|
|
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|
L |
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
M |
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
N |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
O |
|
|
|
|
|
|
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|
|
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|
1 |
|
|
|
P |
|
|
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|
1 |
|
|
Q |
|
|
|
|
1 |
1 |
|
|
|
|
1 |
|
|
1 |
|
T |
|
|
|
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|
|
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|
|
|
|
|
1 |
| 抽取了要素: H I N P Q
|
层级 3 |
|
B | C | D | G | J | K | L | M | O | T |
B |
1 |
|
|
|
1 |
|
|
|
|
|
C |
|
1 |
1 |
|
|
|
|
|
1 |
1 |
D |
|
|
1 |
|
|
|
|
|
|
|
G |
|
|
|
1 |
|
|
|
|
|
|
J |
|
|
|
|
1 |
|
|
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|
|
K |
|
|
|
1 |
|
1 |
|
|
|
|
L |
|
|
1 |
|
|
|
1 |
|
1 |
1 |
M |
|
|
1 |
|
|
|
1 |
1 |
1 |
1 |
O |
|
|
1 |
|
|
|
|
|
1 |
|
T |
|
|
1 |
|
|
|
|
|
1 |
1 |
|
|
B | C | D | G | J | K | L | M | O | T |
B |
1 |
|
|
|
|
|
|
|
|
|
C |
|
1 |
|
|
|
|
|
|
|
|
D |
|
1 |
1 |
|
|
|
1 |
1 |
1 |
1 |
G |
|
|
|
1 |
|
1 |
|
|
|
|
J |
1 |
|
|
|
1 |
|
|
|
|
|
K |
|
|
|
|
|
1 |
|
|
|
|
L |
|
|
|
|
|
|
1 |
1 |
|
|
M |
|
|
|
|
|
|
|
1 |
|
|
O |
|
1 |
|
|
|
|
1 |
1 |
1 |
1 |
T |
|
1 |
|
|
|
|
1 |
1 |
|
1 |
|
|
B |
C |
D |
G |
J |
K |
L |
M |
O |
T |
B |
1 |
|
|
|
|
|
|
|
|
|
C |
|
1 |
|
|
|
|
|
|
|
|
D |
|
|
1 |
|
|
|
|
|
|
|
G |
|
|
|
1 |
|
|
|
|
|
|
J |
|
|
|
|
1 |
|
|
|
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|
K |
|
|
|
|
|
1 |
|
|
|
|
L |
|
|
|
|
|
|
1 |
|
|
|
M |
|
|
|
|
|
|
|
1 |
|
|
O |
|
|
|
|
|
|
|
|
1 |
|
T |
|
|
|
|
|
|
|
|
|
1 |
| 抽取了要素: B C K M
|
层级 4 |
|
D | G | J | L | O | T |
D |
1 |
|
|
|
|
|
G |
|
1 |
|
|
|
|
J |
|
|
1 |
|
|
|
L |
1 |
|
|
1 |
1 |
1 |
O |
1 |
|
|
|
1 |
|
T |
1 |
|
|
|
1 |
1 |
|
|
D | G | J | L | O | T |
D |
1 |
|
|
1 |
1 |
1 |
G |
|
1 |
|
|
|
|
J |
|
|
1 |
|
|
|
L |
|
|
|
1 |
|
|
O |
|
|
|
1 |
1 |
1 |
T |
|
|
|
1 |
|
1 |
|
|
D |
G |
J |
L |
O |
T |
D |
1 |
|
|
|
|
|
G |
|
1 |
|
|
|
|
J |
|
|
1 |
|
|
|
L |
|
|
|
1 |
|
|
O |
|
|
|
|
1 |
|
T |
|
|
|
|
|
1 |
| 抽取了要素: G J L
|
层级 5 |
|
|
| 抽取了要素: T
|
层级 6 |
|
|
| 抽取了要素: O
|
层级 7 |
|
|
| 抽取了要素: D
|