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