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