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