C21221212121211331322132313132313231313232233132313223313232111211   >>    C2122121212121133132213231313231323131323223313231322331323211121   <<    C21221212121211331322132313132313231313232233132313223313232111213   >>      C21221212121211331322132313132313231313232233132313223313232111212   >>