5
2 AB

6

0 0
0 1
0 8
0 10
0 12
0 21
2 BC

9

0 0
0 1
0 4
0 5
0 8
0 11
0 13
0 16
0 22
2 CD

6

0 4
0 5
0 16
0 18
0 19
0 25
2 AD

9

0 2
0 3
0 6
0 7
0 9
0 14
0 15
0 17
0 24
3 ext

6

0 1
0 5
0 12
0 13
0 19
0 23