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