C111123313331323113313331323133313331311331311331333133112111133133322323321   >>    C11112331333132311331333132313331333131133131133133313311211113313332232332   <<    C111123313331323113313331323133313331311331311331333133112111133133322323323   >>      C111123313331323113313331323133313331311331311331333133112111133133322323322   >>