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xxxxxx  ssrrrxxxxx
xxxx    ssrr   xxx
xxxr   ssrrr s fxx
xxxrf m  rr  s  xx
xxrr       ssss  x
xxrr     f  ssss x
xxrr      p ssss x
xxrr s      rr m x
xxf  ssss   rr   x
xx   ssss   rr   x
xx   ssss        x
xxxm  srr       xx
xxx    rrr    m xx
xxxx m  rrr    xxx
xxxxxx  rrrrrxxxxx
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