-er c-- ccc cce ccn ccr cct ccu ce- cec cee cen cer cet ceu cn- cnc cne cnn cnr cnt cnu crc cre crn crr crt cru ctc cte ctn ctr ctt ctu cuc cue cun cur cut cuu ec- ecc ece ecn ecr ect ecu eec eee een eer eet en- enc ene enn enr ent enu erc ere ern err ert eru etc ete etn etr ett etu eu- euc eue eun eur eut ncc nce ncn ncr nct ncu ne- nec nee nen ner net neu nnc nne nnn nnt nnu nrc nre nrn nrr nrt nru ntc nte ntn ntr ntt ntu nuc nue nun nur nut nuu rcc rce rcn rcr rct rcu re- rec ree ren rer ret reu rnc rnn rnr rnt rnu rrc rrn rrr rrt rru rtc rte rtn rtr rtt rtu ruc rue run rur rut ruu tcc tce tcn tcr tct tcu te- tec tee ten ter tet teu tnc tne tnn tnr tnt trc tre trn trr trt tru ttc tte ttn ttr ttt ttu tuc tue tun tur tut tuu ucc uce ucn ucr uct ucu uec uee uen uer uet un- unc une unn unr unt unu ur- urc ure urn urr urt uru utc ute utn utr utt utu uuc uue uun uur uut uuu