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