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