M       M  CCCCC   X    X   RRRRR   OOOOO  SSSSS  SSSSS
MM     MM  C        X  X    R   R  O     O S      S
M M   M M  C         XX     RRRRR  O     O SSSSS  SSSSS
M  M M  M  C        X  X    R  R   O     O     S      S
M   M   M  CCCCC   X    X   R   R   OOOOO  SSSSS  SSSSS