C21221212121211331322132313132313132313232233132313223313232213231   >>    C2122121212121133132213231313231313231323223313231322331323221323   <<    C21221212121211331322132313132313132313232233132313223313232213233   >>      C21221212121211331322132313132313132313232233132313223313232213232   >>