xxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxx
xxxxxxx      rrrxxxxxx
xxxxxx       rrrrxxxxx
xxxx         rrr   xxx
xxxx          rr   xxx
xxx                rxx
xx      f         rrrx
xx               rrrrx
xx         p    rrr  x
xx     f       rrr   x
xx             rr  m x
xx       rrr         x
xxr     rrrr         x
xxr     rrr          x
xxr     rr    rr     x
xxxr         rrr    xx
xxxx        rrr    xxx
xxxx      rrrr     xxx
xxxxxx   rrrr    xxxxx
xxxxxxx  rrrr   xxxxxx
xxxxxxxxxxxxxxxxxxxxxx
