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