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