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