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