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xxxxxxrrrr m xxxxx
xxxxrrrrr    rrxxx
xxxr m       rrrxx
xxx  m          xx
xx             m x
xx           rr  x
xx           rrrrx
xxrrr m rr    rrrx
xxrrr  rrrp      x
xxrrr  rr        x
xxrr             x
xxx         rr  xx
xxx        mrr  xx
xxxx      m rrrxxx
xxxxxx      rxxxxx
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