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xxxxxx       xxxxx
xxxxr          xxx
xxx       h     xx
xxx            fxx
xx          f    x
xx       p       x
xx h         rrrrx
xx  rr      rrrrrx
xxrrrr      rrrrrx
xxrrr       rrrrrx
xxr          rrrrx
xxx     rr      xx
xxx h   rrr     xx
xxxx    rrrr   xxx
xxxxxx  rrrrrxxxxx
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