C11111211113313112113313331333133313331333131133131133133313331323223311221   >>    C1111121111331311211331333133313331333133313113313113313331333132322331122   <<    C11111211113313112113313331333133313331333131133131133133313331323223311223   >>      C11111211113313112113313331333133313331333131133131133133313331323223311222   >>