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