C21221212121211331322132313132313132313232233132313223313231333133313112221   >>    C2122121212121133132213231313231313231323223313231322331323133313331311222   <<    C21221212121211331322132313132313132313232233132313223313231333133313112223   >>      C21221212121211331322132313132313132313232233132313223313231333133313112222   >>