C111123313331323113313331333133313331122112312111113331311331311331313233121   >>    C11112331333132311331333133313331333112211231211111333131133131133131323312   <<    C111123313331323113313331333133313331122112312111113331311331311331313233123   >>      C111123313331323113313331333133313331122112312111113331311331311331313233122   >>