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xxxxxxx   f   rrxxxxxx
xxxxxx        rrrxxxxx
xxxx        mrrr   xxx
xxxx        rrrr   xxx
xxx         rrrr   rxx
xx          rrrr   rrx
xx           rrr     x
xx                   x
xx                   x
xx                   x
xx        p  h       x
xx          rr       x
xxrm        rrr      x
xxrr        rrrrf    x
xxxr         rrr    xx
xxxx               xxx
xxxx        m      xxx
xxxxxx           xxxxx
xxxxxxxr        xxxxxx
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