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xxxxxxrr     xxxxx
xxxxrrrr       xxx
xxx  rrr        xx
xxx  rr         xx
xx               x
xx  f    rr      x
xx      mrrr     x
xx        rr     x
xx     f        mx
xx       p       x
xx           rrrrx
xxx f  rr    rrrxx
xxx  f rrr     rxx
xxxx    rr     xxx
xxxxxx  rrf  xxxxx
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