| 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 |
| |
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 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| B |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| C |
|
|
1 |
|
|
1 |
|
|
1 |
|
1 |
|
|
|
|
|
|
|
|
|
| D |
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
| E |
|
|
1 |
|
1 |
1 |
|
|
1 |
|
1 |
|
|
|
|
|
|
|
|
|
| F |
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| G |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| H |
1 |
1 |
1 |
|
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| I |
|
|
|
|
|
|
|
|
1 |
|
1 |
|
|
|
|
|
|
|
|
|
| J |
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
| K |
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
| L |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| M |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| N |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| O |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
| P |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
|
|
| Q |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
| R |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
| S |
1 |
1 |
1 |
|
|
1 |
1 |
|
1 |
|
1 |
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
| T |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
| |
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 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| B |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| C |
1 |
1 |
1 |
|
1 |
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| D |
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| E |
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| F |
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| G |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| H |
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
| I |
1 |
1 |
1 |
|
1 |
|
1 |
1 |
1 |
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| J |
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
| K |
1 |
1 |
1 |
|
1 |
|
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| L |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| M |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| N |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| O |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
| P |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
|
1 |
|
| Q |
1 |
1 |
|
|
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
1 |
|
1 |
|
| R |
1 |
1 |
|
1 |
|
|
1 |
1 |
|
|
|
1 |
1 |
1 |
|
1 |
|
1 |
1 |
|
| S |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
| T |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
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 |
1 |
1 |
|
1 |
|
|
|
|
| B |
1 |
1 |
|
|
|
|
1 |
|
|
|
|
1 |
1 |
1 |
|
1 |
|
|
|
|
| C |
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| D |
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| E |
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| F |
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| G |
1 |
1 |
|
|
|
|
1 |
|
|
|
|
1 |
1 |
1 |
|
1 |
|
|
|
|
| H |
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
| I |
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
| J |
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
| K |
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
| L |
1 |
1 |
|
|
|
|
1 |
|
|
|
|
1 |
1 |
1 |
|
1 |
|
|
|
|
| M |
1 |
1 |
|
|
|
|
1 |
|
|
|
|
1 |
1 |
1 |
|
1 |
|
|
|
|
| N |
1 |
1 |
|
|
|
|
1 |
|
|
|
|
1 |
1 |
1 |
|
1 |
|
|
|
|
| O |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
| P |
1 |
1 |
|
|
|
|
1 |
|
|
|
|
1 |
1 |
1 |
|
1 |
|
|
|
|
| Q |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
| R |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
| S |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
| T |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
| 抽取了要素: D E H J O S T
|
| 层级 2 |
| |
A | B | C | F | G | I | K | L | M | N | P | Q | R |
| A |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| B |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| C |
|
|
1 |
1 |
|
1 |
1 |
|
|
|
|
|
|
| F |
|
|
|
1 |
|
|
|
|
|
|
|
|
|
| G |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| I |
|
|
|
|
|
1 |
1 |
|
|
|
|
|
|
| K |
|
|
|
|
|
|
1 |
|
|
|
|
|
|
| L |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| M |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| N |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| P |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| Q |
|
|
|
|
|
|
|
|
|
|
|
1 |
|
| R |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
| |
A | B | C | F | G | I | K | L | M | N | P | Q | R |
| A |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| B |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| C |
1 |
1 |
1 |
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| F |
1 |
1 |
1 |
1 |
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| G |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| I |
1 |
1 |
1 |
|
1 |
1 |
|
1 |
1 |
1 |
1 |
|
|
| K |
1 |
1 |
1 |
|
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
| L |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| M |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| N |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| P |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| Q |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
1 |
|
| R |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
1 |
|
|
A |
B |
C |
F |
G |
I |
K |
L |
M |
N |
P |
Q |
R |
| A |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| B |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| C |
|
|
1 |
|
|
|
|
|
|
|
|
|
|
| F |
|
|
|
1 |
|
|
|
|
|
|
|
|
|
| G |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| I |
|
|
|
|
|
1 |
|
|
|
|
|
|
|
| K |
|
|
|
|
|
|
1 |
|
|
|
|
|
|
| L |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| M |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| N |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| P |
1 |
1 |
|
|
1 |
|
|
1 |
1 |
1 |
1 |
|
|
| Q |
|
|
|
|
|
|
|
|
|
|
|
1 |
|
| R |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
| 抽取了要素: A B G L M N P
|
| 层级 3 |
| |
C | F | I | K | Q | R |
| C |
1 |
1 |
1 |
1 |
|
|
| F |
|
1 |
|
|
|
|
| I |
|
|
1 |
1 |
|
|
| K |
|
|
|
1 |
|
|
| Q |
|
|
|
|
1 |
|
| R |
|
|
|
|
|
1 |
|
| |
C | F | I | K | Q | R |
| C |
1 |
|
|
|
|
|
| F |
1 |
1 |
|
|
|
|
| I |
1 |
|
1 |
|
|
|
| K |
1 |
|
1 |
1 |
|
|
| Q |
|
|
|
|
1 |
|
| R |
|
|
|
|
|
1 |
|
|
C |
F |
I |
K |
Q |
R |
| C |
1 |
|
|
|
|
|
| F |
|
1 |
|
|
|
|
| I |
|
|
1 |
|
|
|
| K |
|
|
|
1 |
|
|
| Q |
|
|
|
|
1 |
|
| R |
|
|
|
|
|
1 |
| 抽取了要素: C Q R
|
| 层级 4 |
|
|
| 抽取了要素: F I
|
| 层级 5 |
|
|
| 抽取了要素: K
|