C21221212121211331322132313132313231323223313211232313331311331313232212111   >>    C2122121212121133132213231313231323132322331321123231333131133131323221211   <<    C21221212121211331322132313132313231323223313211232313331311331313232212113   >>      C21221212121211331322132313132313231323223313211232313331311331313232212112   >>