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