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