xxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxx
xxxxxx      rxxxxx
xxxxr       rrrxxx
xxxf          f xx
xxx     rr m    xx
xx      rr f     x
xx      rr       x
xx           rrrrx
xx           rrrrx
xx        p    rrx
xxr             rx
xxrrf    rrr    rx
xxxrr    rrr    xx
xxxrrr         fxx
xxxxrrr        xxx
xxxxxxrr h   xxxxx
xxxxxxxxxxxxxxxxxx
