C21221212121211331322132313132313231323223313211232313331311331313221   >>    C2122121212121133132213231313231323132322331321123231333131133131322   <<    C21221212121211331322132313132313231323223313211232313331311331313223   >>      C21221212121211331322132313132313231323223313211232313331311331313222   >>