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xxxxxx       xxxxx
xxxx           xxx
xxx        ss   xx
xxx        ss   xx
xx  m  m  sssss  x
xx    s   ssss   x
xx   ss pssssrrrrx
xx   sss smsrrrrrx
xx   ms     rrrrrx
xx          rrrrrx
xx m rrr     rrrrx
xxx mrrrr  sss  xx
xxx   rrrrssss  xx
xxxx    rrrssssxxx
xxxxxx  rrrrrxxxxx
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