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