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