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