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