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