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