C1111233131211111211113313331333133313221211113313331333133313113311211312111   >>    C111123313121111121111331333133313331322121111331333133313331311331121131211   <<    C1111233131211111211113313331333133313221211113313331333133313113311211312113   >>      C1111233131211111211113313331333133313221211113313331333133313113311211312112   >>