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