xxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxx
xxxxxxr     sxxxxx
xxxxrs  f   srrxxx
xxxr      f  rrrxx
xxx         rrrrxx
xx          rrrssx
xx     f    rr   x
xx   rrr  p    f x
xx   rrr   f    rx
xx              rx
xx          f   rx
xxrr            rx
xxxr    rr  f   xx
xxxr    rrr     xx
xxxx    rrrr   xxx
xxxxxx frrrrrxxxxx
xxxxxxxxxxxxxxxxxx
