C21221212121211331322132313132313132313232233132313223313311232313231313232321   >>    C2122121212121133132213231313231313231323223313231322331331123231323131323232   <<    C21221212121211331322132313132313132313232233132313223313311232313231313232323   >>      C21221212121211331322132313132313132313232233132313223313311232313231313232322   >>