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