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