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