C111123313331323113313331323133313331311331311331333133112111112232233231   >>    C11112331333132311331333132313331333131133131133133313311211111223223323   <<    C111123313331323113313331323133313331311331311331333133112111112232233233   >>      C111123313331323113313331323133313331311331311331333133112111112232233232   >>