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