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