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