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