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