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