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