C11112331333132311331333133313231333131133131211113313331311223111   >>    C1111233133313231133133313331323133313113313121111331333131122311   <<    C11112331333132311331333133313231333131133131211113313331311223113   >>      C11112331333132311331333133313231333131133131211113313331311223112   >>