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