C1111233131211111211113313331333133313221211113313331333133313121133132311111   >>    C111123313121111121111331333133313331322121111331333133313331312113313231111   <<    C1111233131211111211113313331333133313221211113313331333133313121133132311113   >>      C1111233131211111211113313331333133313221211113313331333133313121133132311112   >>