C21221212121211331322132313132313231313232233132313223313231333133313232233121   >>    C2122121212121133132213231313231323131323223313231322331323133313331323223312   <<    C21221212121211331322132313132313231313232233132313223313231333133313232233123   >>      C21221212121211331322132313132313231313232233132313223313231333133313232233122   >>