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