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