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