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