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