C21221212121211331322132313132313231313232233132313223313231333133313211231111   >>    C2122121212121133132213231313231323131323223313231322331323133313331321123111   <<    C21221212121211331322132313132313231313232233132313223313231333133313211231113   >>      C21221212121211331322132313132313231313232233132313223313231333133313211231112   >>