-er a-a a-c a-t aaa aac aad aae aao aar aat aav ac- aca acc acd ace aco acr act acv ad- ada adc add ade ado adr adt adv aea aec aed aee aeo aer aet aev aoa aoc aod aoe aoo aor aot aov ar- ara arc ard are aro arr art arv at- ata atc atd ate ato atr att atv av- ava avc avd ave avo avr avt c-- caa cac cad cae cao car cat cav cca ccc ccd cce cco ccr cct ccv cda cdc cdd cde cdo cdr cdt cdv ce- cea cec ced cee ceo cer cet cev co- coa coc cod coe coo cor cot cov cra crc crd cre cro crr crt crv cta ctc ctd cte cto ctr ctt ctv cva cvc cvd cve cvo cvr cvt cvv daa dac dad dae dao dar dat dav dca dcc dcd dce dco dcr dct dcv dda ddc ddd dde ddo ddr ddt de- dea dec ded dee deo der det dev doa doc dod doe doo dor dot dov dra drc drd dre dro drr drt drv dta dtc dtd dte dto dtr dtt dtv dva dvc dvd dve dvr dvt eaa eac ead eae eao ear eat eav ec- eca ecc ecd ece eco ecr ect ecv ed- eda edc edd ede edo edr edt eea eec eed eee eeo eer eet eev eo- eoa eoc eod eoe eoo eor eot era erc erd ere ero err ert erv eta etc etd ete eto etr ett etv eva evc evd eve evo evr evt evv oaa oac oad oae oao oar oat oav oc- oca occ ocd oco ocr oct ocv oda odc odd ode odo odr odt odv oea oec oed oee oeo oer oet oo- ooa ooc ood ooo oor oot oov or- ora orc ord ore oro orr ort orv ot- ota otc otd ote oto otr ott otv ov- ova ovc ovd ove ovo ovv ra- raa rac rad rae rao rar rat rav rca rcc rcd rce rco rcr rct rcv rda rdc rdd rde rdo rdr rdt rdv re- rea rec red ree reo rer ret rev roa roc rod roe roo ror rot rov rra rrc rrd rrr rrt rta rtc rtd rte rto rtr rtt rtv rva rvc rvd rve rvo rvr rvt rvv taa tac tad tae tao tar tat tav tca tcc tcd tce tco tcr tct tcv tda tdc tdd tde tdo tdr tdt tdv te- tea tec ted tee teo ter tet tev to- toa toc tod toe too tor tot tov tra trc trd tre tro trr trt trv tta ttc ttd tte tto ttr ttt ttv tva tvc tvd tve tvo tvr tvt v-a v-e vaa vac vad vae vao var vat vav vca vcc vcd vce vco vcr vct vdc vdd vde vdo vdr vdt vdv vea vec ved vee veo ver vet voa voc vod voe voo vor vot vov vra vrc vrd vre vrr vrt vta vtc vte vto vtr vtt vtv vva vvc vvo vvr vvt vvv