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