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