C111123313331323113313331333133313331122112312111133131133131323123121   >>    C11112331333132311331333133313331333112211231211113313113313132312312   <<    C111123313331323113313331333133313331122112312111133131133131323123123   >>      C111123313331323113313331333133313331122112312111133131133131323123122   >>