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