-er a-a a-c aaa aac aad aae aao aap aar aav ac- aca acc acd ace aco acp acr acv ad- ada adc add ade ado adp adr adv aea aec aed aee aeo aep aer aev aoa aoc aod aoe aoo aop aor aov ap- apa apc apd ape apo app apr apv ar- ara arc ard are aro arp arr arv av- ava avc avd ave avo avp avr c-- caa cac cad cae cao cap car cav cca ccc ccd cce cco ccp ccr ccv cda cdc cdd cde cdo cdp cdr cdv ce- cea cec ced cee ceo cep cer cev co- coa coc cod coe coo cop cor cov cpa cpc cpd cpe cpo cpp cpr cpv cra crc crd cre cro crp crr crv cva cvc cvd cve cvo cvp cvr cvv daa dac dad dae dao dap dar dav dca dcc dcd dce dco dcp dcr dcv dda ddc ddd dde ddo ddp ddr de- dea dec ded dee deo dep der dev doa doc dod doe doo dop dor dov dpa dpc dpd dpe dpo dpp dpr dpv dra drc drd dre dro drp drr drv dva dvc dvd dve dvp dvr eaa eac ead eae eao eap ear eav ec- eca ecc ecd ece eco ecr ecv ed- eda edc edd ede edo edp edr eea eec eed eee eeo eep eer eev eo- eoa eoc eod eoe eoo eop eor ep- epa epc epd epe epo epp epr era erc erd ere ero erp err erv eva evc evd eve evo evp evr evv oaa oac oad oae oao oap oar oav oc- oca occ ocd oco ocp ocr ocv oda odc odd ode odo odp odr odv oea oec oed oee oeo oep oer oo- ooa ooc ood ooo oop oor oov op- opa opc opd ope opo opp opr opv or- ora orc ord ore oro orp orr orv ov- ova ovc ovd ove ovo ovp ovv p-p paa pac pad pae pao pap par pav pca pcc pcd pce pco pcp pcr pcv pda pdc pdd pde pdo pdp pdr pdv pea pec ped pee peo pep per pev poa poc pod poe poo pop por pov ppa ppc ppd ppe ppo ppp ppr ppv pra prc prd pre pro prp prr prv pva pvc pvd pve pvo pvp pvr pvv ra- raa rac rad rae rao rap rar rav rca rcc rcd rce rco rcp rcr rcv rda rdc rdd rde rdo rdp rdr rdv re- rea rec red ree reo rep rer rev roa roc rod roe roo rop ror rov rpa rpc rpd rpe rpo rpp rpr rpv rra rrc rrd rrp rrr rva rvc rvd rve rvo rvp rvr rvv v-a v-e vaa vac vad vae vao vap var vav vca vcc vcd vce vco vcp vcr vdc vdd vde vdo vdp vdr vdv vea vec ved vee veo vep ver voa voc vod voe voo vop vor vov vpa vpc vpd vpe vpo vpp vpr vra vrc vrd vre vrp vrr vva vvc vvo vvr vvv