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