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