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xxxxxx s  sssss  xxxxx
xxxxss s rrrs      xxx
xxxxsss rrrr       xxx
xxxssssrrr         rxx
xx ssssrr     sssrrrrx
xx ss         sssrrrrx
xx   m      rr ssm   x
xx          rrrs     x
xx          rrrr     x
xx   rrr   p rrr     x
xx  rrrrr            x
xxrrrrrrr      m     x
xxrrrrrrr            x
xxxr             rrrxx
xxxx       rr    rrxxx
xxxx      rrr    rrxxx
xxxxxx   rrrr    xxxxx
xxxxxxx  rrrr   xxxxxx
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