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