C21221212121211331322132313132313132313232233132313223313232331   >>    C2122121212121133132213231313231313231323223313231322331323233   <<    C21221212121211331322132313132313132313232233132313223313232333   >>      C21221212121211331322132313132313132313232233132313223313232332   >>