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