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