C21221212121211331322132313132313231323223313211232313331311331313232211   >>    C2122121212121133132213231313231323132322331321123231333131133131323221   <<    C21221212121211331322132313132313231323223313211232313331311331313232213   >>      C21221212121211331322132313132313231323223313211232313331311331313232212   >>