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xxxxrrrr     rrrrxxx
xxx   rr          xx
xx                 x
xx            s    x
xx   rrr  m        x
xxrrrrrr p       f x
xxrrrr             x
xxrrr     rr  s    x
xx       rrr  s    x
xx      rrr       sx
xx      rrr        x
xxxr    rrr       xx
xxxx     rrr     xxx
xxxxx     rr   rxxxx
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