-er c-- ccc cce ccn ccr cct ccu ccx ce- cec cee cen cer cet ceu cex cn- cnc cne cnn cnr cnt cnu cnx crc cre crn crr crt cru crx ctc cte ctn ctr ctt ctu ctx cuc cue cun cur cut cuu cxc cxr cxt cxx ec- ecc ece ecn ecr ect ecu ecx eec eee een eer eet eex en- enc ene enn enr ent enu erc ere ern err ert eru etc ete etn etr ett etu etx eu- euc eue eun eur eut eux ex- exc exe exr ext exu exx ncc nce ncn ncr nct ncu ncx ne- nec nee nen ner net neu nex nnc nne nnn nnt nnu nrc nre nrn nrr nrt nru nrx ntc nte ntn ntr ntt ntu ntx nuc nue nun nur nut nuu nux nxc nxt rcc rce rcn rcr rct rcu rcx re- rec ree ren rer ret reu rex rnc rnn rnr rnt rnu rrc rrn rrr rrt rru rtc rte rtn rtr rtt rtu rtx ruc rue run rur rut ruu rux rxr t-x tcc tce tcn tcr tct tcu tcx te- tec tee ten ter tet teu tex tnc tne tnn tnr tnt tnx trc tre trn trr trt tru trx ttc tte ttn ttr ttt ttu ttx tuc tue tun tur tut tuu tux txe txn txt txu ucc uce ucn ucr uct ucu uec uee uen uer uet un- unc une unn unr unt unu unx ur- urc ure urn urr urt uru urx utc ute utn utr utt utu utx uuc uue uun uur uut uuu uxc uxr uxt uxu xcr xcx xee xen xer xet xeu xex xnc xnu xrc xrt xrx xtc xtr xtx xue xun xxx