-er a-a a-c a-t aaa aac aae aam aan aao aar aat ac- aca acc ace acm acn aco acr act aea aec aee aem aen aeo aer aet ama amc ame amm amn amo amr amt an- ana anc ane anm ann ano anr ant aoa aoc aoe aom aon aoo aor aot ar- ara arc are arm arn aro arr art at- ata atc ate atm atn ato atr att c-- caa cac cae cam can cao car cat cca ccc cce ccm ccn cco ccr cct ce- cea cec cee cem cen ceo cer cet cma cmc cme cmm cmn cmo cmr cmt cn- cna cnc cne cnm cnn cno cnr cnt co- coa coc coe com con coo cor cot cra crc cre crm crn cro crr crt cta ctc cte ctm ctn cto ctr ctt eaa eac eae eam ean eao ear eat ec- eca ecc ece ecm ecn eco ecr ect eea eec eee eem een eeo eer eet em- ema emc eme emm emn emo emr emt en- ena enc ene enm enn eno enr ent eo- eoa eoc eoe eom eon eoo eor eot era erc ere erm ern ero err ert eta etc ete etm etn eto etr ett m-o m-r maa mac mae mam man mao mar mat mc- mca mcc mce mcm mcn mco mcr mct mea mec mee mem men meo mer met mma mmc mme mmm mmn mmo mmr mmt mna mnc mne mnm mnn mno mnr mnt moa moc moe mom mon moo mor mot mra mrc mre mrm mrn mro mrr mrt mta mtc mte mtm mtn mto mtr mtt naa nac nae nam nan nao nar nat nca ncc nce ncm ncn nco ncr nct ne- nea nec nee nem nen neo ner net nma nmc nme nmm nmn nmo nmr nmt nna nnc nne nnm nnn nno nnt no- noa noc noe nom non noo nor not nra nrc nre nrm nrn nro nrr nrt nta ntc nte ntm ntn nto ntr ntt oaa oac oae oam oan oao oar oat oc- oca occ ocm ocn oco ocr oct oea oec oee oem oen oeo oer oet om- oma omc ome omm omn omo omr omt on- ona onc one onn ono onr ont oo- ooa ooc oom oon ooo oor oot or- ora orc ore orm orn oro orr ort ot- ota otc ote otm otn oto otr ott ra- raa rac rae ram ran rao rar rat rca rcc rce rcm rcn rco rcr rct re- rea rec ree rem ren reo rer ret rma rmc rme rmm rmn rmo rmr rmt rna rnc rnm rnn rno rnr rnt roa roc roe rom ron roo ror rot rra rrc rrm rrn rrr rrt rta rtc rte rtm rtn rto rtr rtt taa tac tae tam tan tao tar tat tca tcc tce tcm tcn tco tcr tct te- tea tec tee tem ten teo ter tet tma tmc tme tmm tmn tmo tmr tmt tna tnc tne tnm tnn tno tnr tnt to- toa toc toe tom ton too tor tot tra trc tre trm trn tro trr trt tta ttc tte ttm ttn tto ttr ttt