-er a-a a-c a-t aaa aac aae aan aao aar aat aav ac- aca acc ace acn aco acr act acv aea aec aee aen aeo aer aet aev an- ana anc ane ann ano anr ant anv aoa aoc aoe aon aoo aor aot aov ar- ara arc are arn aro arr art arv at- ata atc ate atn ato atr att atv av- ava avc ave avn avo avr avt c-- caa cac cae can cao car cat cav cca ccc cce ccn cco ccr cct ccv ce- cea cec cee cen ceo cer cet cev cn- cna cnc cne cnn cno cnr cnt cnv co- coa coc coe con coo cor cot cov cra crc cre crn cro crr crt crv cta ctc cte ctn cto ctr ctt ctv cva cvc cve cvn cvo cvr cvt cvv eaa eac eae ean eao ear eat eav ec- eca ecc ece ecn eco ecr ect ecv eea eec eee een eeo eer eet eev en- ena enc ene enn eno enr ent env eo- eoa eoc eoe eon eoo eor eot era erc ere ern ero err ert erv eta etc ete etn eto etr ett etv eva evc eve evn evo evr evt evv naa nac nae nan nao nar nat nav nca ncc nce ncn nco ncr nct ncv ne- nea nec nee nen neo ner net nev nna nnc nne nnn nno nnt nnv no- noa noc noe non noo nor not nov nra nrc nre nrn nro nrr nrt nrv nta ntc nte ntn nto ntr ntt ntv nva nvc nve nvn nvt nvv oaa oac oae oan oao oar oat oav oc- oca occ ocn oco ocr oct ocv oea oec oee oen oeo oer oet on- ona onc one onn ono onr ont oo- ooa ooc oon ooo oor oot oov or- ora orc ore orn oro orr ort orv ot- ota otc ote otn oto otr ott otv ov- ova ovc ove ovo ovv ra- raa rac rae ran rao rar rat rav rca rcc rce rcn rco rcr rct rcv re- rea rec ree ren reo rer ret rev rna rnc rnn rno rnr rnt rnv roa roc roe ron roo ror rot rov rra rrc rrn rrr rrt rta rtc rte rtn rto rtr rtt rtv rva rvc rve rvn rvo rvr rvt rvv taa tac tae tan tao tar tat tav tca tcc tce tcn tco tcr tct tcv te- tea tec tee ten teo ter tet tev tna tnc tne tnn tno tnr tnt to- toa toc toe ton too tor tot tov tra trc tre trn tro trr trt trv tta ttc tte ttn tto ttr ttt ttv tva tvc tve tvn tvo tvr tvt v-a v-e vaa vac vae van vao var vat vav vca vcc vce vcn vco vcr vct vea vec vee ven veo ver vet vn- vna vno vnr vnv voa voc voe von voo vor vot vov vra vrc vre vrn vrr vrt vta vtc vte vto vtr vtt vtv vva vvc vvo vvr vvt vvv