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