C31232233133313221211113313331333133313311211231211113313113313232121211   >>    C3123223313331322121111331333133313331331121123121111331311331323212121   <<    C31232233133313221211113313331333133313311211231211113313113313232121213   >>      C31232233133313221211113313331333133313311211231211113313113313232121212   >>