-er a-a a-c a-t aaa aac aae aam aan aar aat ac- aca acc ace acm acn acr act aea aec aee aem aen aer aet ama amc ame amm amn amr amt an- ana anc ane anm ann anr ant ar- ara arc are arm arn arr art at- ata atc ate atm atn atr att c-- caa cac cae cam can car cat cca ccc cce ccm ccn ccr cct ce- cea cec cee cem cen cer cet cma cmc cme cmm cmn cmr cmt cn- cna cnc cne cnm cnn cnr cnt cra crc cre crm crn crr crt cta ctc cte ctm ctn ctr ctt eaa eac eae eam ean ear eat ec- eca ecc ece ecm ecn ecr ect eea eec eee eem een eer eet em- ema emc eme emm emn emr emt en- ena enc ene enm enn enr ent era erc ere erm ern err ert eta etc ete etm etn etr ett m-r maa mac mae mam man mar mat mc- mca mcc mce mcm mcn mcr mct mea mec mee mem men mer met mma mmc mme mmm mmn mmr mmt mna mnc mne mnm mnn mnr mnt mra mrc mre mrm mrn mrr mrt mta mtc mte mtm mtn mtr mtt naa nac nae nam nan nar nat nca ncc nce ncm ncn ncr nct ne- nea nec nee nem nen ner net nma nmc nme nmm nmn nmr nmt nna nnc nne nnm nnn nnt nra nrc nre nrm nrn nrr nrt nta ntc nte ntm ntn ntr ntt ra- raa rac rae ram ran rar rat rca rcc rce rcm rcn rcr rct re- rea rec ree rem ren rer ret rma rmc rme rmm rmn rmr rmt rna rnc rnm rnn rnr rnt rra rrc rrm rrn rrr rrt rta rtc rte rtm rtn rtr rtt taa tac tae tam tan tar tat tca tcc tce tcm tcn tcr tct te- tea tec tee tem ten ter tet tma tmc tme tmm tmn tmr tmt tna tnc tne tnm tnn tnr tnt tra trc tre trm trn trr trt tta ttc tte ttm ttn ttr ttt