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