-er a-a a-c a-t aaa aac aae aam aao aar aat aav ac- aca acc ace acm aco acr act acv aea aec aee aem aeo aer aet aev ama amc ame amm amo amr amt amv aoa aoc aoe aom aoo aor aot aov ar- ara arc are arm aro arr art arv at- ata atc ate atm ato atr att atv av- ava avc ave avm avo avr avt c-- caa cac cae cam cao car cat cav cca ccc cce ccm cco ccr cct ccv ce- cea cec cee cem ceo cer cet cev cma cmc cme cmm cmo cmr cmt cmv co- coa coc coe com coo cor cot cov cra crc cre crm cro crr crt crv cta ctc cte ctm cto ctr ctt ctv cva cvc cve cvm cvo cvr cvt cvv eaa eac eae eam eao ear eat eav ec- eca ecc ece ecm eco ecr ect ecv eea eec eee eem eeo eer eet eev em- ema emc eme emm emo emr emt emv eo- eoa eoc eoe eom eoo eor eot era erc ere erm ero err ert erv eta etc ete etm eto etr ett etv eva evc eve evm evo evr evt evv m-o m-r m-v maa mac mae mam mao mar mat mav mc- mca mcc mce mcm mco mcr mct mcv mea mec mee mem meo mer met mev mma mmc mme mmm mmo mmr mmt mmv moa moc moe mom moo mor mot mov mra mrc mre mrm mro mrr mrt mrv mta mtc mte mtm mto mtr mtt mtv mva mvc mve mvm mvo mvr mvt mvv oaa oac oae oam oao oar oat oav oc- oca occ ocm oco ocr oct ocv oea oec oee oem oeo oer oet om- oma omc ome omm omo omr omt omv oo- ooa ooc oom ooo oor oot oov or- ora orc ore orm oro orr ort orv ot- ota otc ote otm oto otr ott otv ov- ova ovc ove ovo ovv ra- raa rac rae ram rao rar rat rav rca rcc rce rcm rco rcr rct rcv re- rea rec ree rem reo rer ret rev rma rmc rme rmm rmo rmr rmt rmv roa roc roe rom roo ror rot rov rra rrc rrm rrr rrt rta rtc rte rtm rto rtr rtt rtv rva rvc rve rvm rvo rvr rvt rvv taa tac tae tam tao tar tat tav tca tcc tce tcm tco tcr tct tcv te- tea tec tee tem teo ter tet tev tma tmc tme tmm tmo tmr tmt tmv to- toa toc toe tom too tor tot tov tra trc tre trm tro trr trt trv tta ttc tte ttm tto ttr ttt ttv tva tvc tve tvm tvo tvr tvt v-a v-e vaa vac vae vam vao var vat vav vca vcc vce vcm vco vcr vct vea vec vee vem veo ver vet vm- vma vmc vmm vmo vmr vmt voa voc voe vom voo vor vot vov vra vrc vre vrm vrr vrt vta vtc vte vtm vto vtr vtt vtv vva vvc vvm vvo vvr vvt vvv