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