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