20
11 20 17 12 19 18 16 13 15 14 
17 11 20 19 18 13 16 14 15 12 
15 18 11 13 19 14 16 17 20 12 
20 12 11 18 15 17 13 16 19 14 
19 14 11 17 18 15 16 13 12 20 
20 17 13 12 19 11 15 14 16 18 
11 14 15 12 16 20 18 17 19 13 
19 16 14 20 17 13 18 11 15 12 
17 14 19 12 16 18 15 11 13 20 
14 18 19 17 12 13 16 11 15 20 
9 6 1 8 10 5 2 7 4 3 
3 5 10 2 6 1 4 9 8 7 
6 4 7 3 2 5 10 8 9 1 
2 8 1 6 7 5 3 10 4 9 
1 9 2 8 6 4 10 3 5 7 
1 3 6 8 5 7 4 10 2 9 
4 10 6 3 9 5 7 8 2 1 
5 4 10 2 1 7 8 9 6 3 
5 9 7 3 2 10 8 4 6 1 
3 10 5 6 8 1 7 2 9 4 
forbidden 1 14
forbidden 1 16
forbidden 1 18
forbidden 1 19
forbidden 1 20
forbidden 2 11
forbidden 2 12
forbidden 2 14
forbidden 2 15
forbidden 2 16
forbidden 2 17
forbidden 2 18
forbidden 2 19
forbidden 2 20
forbidden 3 11
forbidden 3 12
forbidden 3 13
forbidden 3 14
forbidden 3 15
forbidden 3 16
forbidden 3 17
forbidden 3 20
forbidden 4 11
forbidden 4 12
forbidden 4 13
forbidden 4 14
forbidden 4 15
forbidden 4 17
forbidden 4 18
forbidden 4 19
forbidden 4 20
forbidden 5 11
forbidden 5 12
forbidden 5 13
forbidden 5 15
forbidden 5 17
forbidden 5 19
forbidden 5 20
forbidden 6 12
forbidden 6 13
forbidden 6 14
forbidden 6 15
forbidden 6 18
forbidden 6 19
forbidden 6 20
forbidden 7 12
forbidden 7 13
forbidden 7 14
forbidden 7 15
forbidden 7 17
forbidden 7 19
forbidden 7 20
forbidden 8 11
forbidden 8 12
forbidden 8 13
forbidden 8 14
forbidden 8 15
forbidden 8 16
forbidden 8 18
forbidden 8 20
forbidden 9 11
forbidden 9 12
forbidden 9 13
forbidden 9 15
forbidden 9 16
forbidden 9 17
forbidden 9 18
forbidden 9 19
forbidden 10 11
forbidden 10 12
forbidden 10 13
forbidden 10 15
forbidden 10 16
forbidden 10 18
forbidden 10 19
forbidden 10 20