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

s 8 5 6 0 1 2 7 3 4 
s 3 6 5 19 
s 3 0 6 15 
s 3 1 0 13 
s 3 2 1 11 
s 3 7 2 12 
s 3 3 7 9 
s 3 4 3 8 
s 3 5 4 18 
s 3 19 5 18 
s 3 15 6 19 
s 3 13 0 15 
s 3 11 1 13 
s 3 12 2 11 
s 3 9 7 12 
s 3 8 3 9 
s 3 18 4 8 
s 4 10 14 16 17 
s 3 17 18 8 
s 4 17 8 9 10 
s 3 10 9 12 
s 4 10 12 11 14 
s 3 14 11 13 
s 4 14 13 15 16 
s 3 16 15 19 
s 4 16 19 18 17