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xxxxxxx         xxxxxx
xxxxxx           xxxxx
xxxx     rrr       xxx
xxxx     rrr       xxx
xxx                 xx
xx                h rx
xx       h   rrr     x
xx      rr   rrr     x
xx      rrr          x
xx      rrr p        x
xx       rrr         x
xx  rr    rr   rr   rx
xx  rr         rr  rrx
xx  rrr        rr  rrx
xxx  rrr           rxx
xxxx  rr   rr      xxx
xxxx       rr      xxx
xxxxxx     rr    xxxxx
xxxxxxx    rr   xxxxxx
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