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