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xxxxxx   rrrrxxxxx
xxxx     rrr   xxx
xxxr     rrr    xx
xxxr            xx
xx               x
xx       p       x
xxm              x
xx     m        rx
xx              rx
xx       rr     rx
xx       rrr    rx
xxx       rrr   xx
xxx        rrr  xx
xxxx        rrrxxx
xxxxxx m    rxxxxx
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