C11112331333132311331333133313231333131133131211113313331311223213121   >>    C1111233133313231133133313331323133313113313121111331333131122321312   <<    C11112331333132311331333133313231333131133131211113313331311223213123   >>      C11112331333132311331333133313231333131133131211113313331311223213122   >>