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