C21221212121211331322132313132313231313232233132313223313231322121111   >>    C2122121212121133132213231313231323131323223313231322331323132212111   <<    C21221212121211331322132313132313231313232233132313223313231322121113   >>      C21221212121211331322132313132313231313232233132313223313231322121112   >>