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