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