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