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