C21221212121211331322132313132313132313232233132313223313231333133313123233111   >>    C2122121212121133132213231313231313231323223313231322331323133313331312323311   <<    C21221212121211331322132313132313132313232233132313223313231333133313123233113   >>      C21221212121211331322132313132313132313232233132313223313231333133313123233112   >>