C111123313331323113313331323133313331311331311331333133112111133132211311311   >>    C11112331333132311331333132313331333131133131133133313311211113313221131131   <<    C111123313331323113313331323133313331311331311331333133112111133132211311313   >>      C111123313331323113313331323133313331311331311331333133112111133132211311312   >>