C21221212121211331322132313132313132313232233132313223313132313211   >>    C2122121212121133132213231313231313231323223313231322331313231321   <<    C21221212121211331322132313132313132313232233132313223313132313213   >>      C21221212121211331322132313132313132313232233132313223313132313212   >>