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xxxxxx       xxxxx
xxxx  h        xxx
xxx      hh h  rxx
xxx        rrrrrxx
xx         rrrrrrx
xx       h  rrrrrx
xx   rrr  p      x
xx  rrrr         x
xx  rrr          x
xx  rr    rr     x
xx       rrr     x
xxx  h   rrr    xx
xxx      rrr    xx
xxxx     rrr   xxx
xxxxxx   rrrrxxxxx
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