C1111233131211111211113313331333133313331333133313331333133313112211232231   >>    C111123313121111121111331333133313331333133313331333133313331311221123223   <<    C1111233131211111211113313331333133313331333133313331333133313112211232233   >>      C1111233131211111211113313331333133313331333133313331333133313112211232232   >>