-er a-a a-c aaa aac aae aao aap aar aas aav ac- aca acc ace aco acp acr acs acv aea aec aee aeo aep aer aes aev aoa aoc aoe aoo aop aor aos aov ap- apa apc ape apo app apr aps apv ar- ara arc are aro arp arr ars arv as- asa asc ase aso asp asr ass asv av- ava avc ave avo avp avr avs c-- caa cac cae cao cap car cas cav cca ccc cce cco ccp ccr ccs ccv ce- cea cec cee ceo cep cer ces cev co- coa coc coe coo cop cor cos cov cpa cpc cpe cpo cpp cpr cps cpv cra crc cre cro crp crr crs crv csa csc cse cso csp csr css csv cva cvc cve cvo cvp cvr cvs cvv eaa eac eae eao eap ear eas eav ec- eca ecc ece eco ecr ecs ecv eea eec eee eeo eep eer ees eev eo- eoa eoc eoe eoo eop eor eos ep- epa epc epe epo epp epr eps era erc ere ero erp err ers erv es- esa esc ese eso esp esr ess esv eva evc eve evo evp evr evs evv oaa oac oae oao oap oar oas oav oc- oca occ oco ocp ocr ocs ocv oea oec oee oeo oep oer oes oo- ooa ooc ooo oop oor oos oov op- opa opc ope opo opp opr ops opv or- ora orc ore oro orp orr ors orv os- osa osc ose oso osp osr oss osv ov- ova ovc ove ovo ovp ovs ovv p-p paa pac pae pao pap par pas pav pca pcc pce pco pcp pcr pcs pcv pea pec pee peo pep per pes pev poa poc poe poo pop por pos pov ppa ppc ppe ppo ppp ppr pps ppv pra prc pre pro prp prr prs prv ps- psa psc pse pso psp psr pss psv pva pvc pve pvo pvp pvr pvs pvv ra- raa rac rae rao rap rar ras rav rca rcc rce rco rcp rcr rcs rcv re- rea rec ree reo rep rer res rev roa roc roe roo rop ror ros rov rpa rpc rpe rpo rpp rpr rps rpv rra rrc rrp rrr rrs rsa rsc rse rso rsp rsr rss rsv rva rvc rve rvo rvp rvr rvs rvv saa sac sae sao sap sar sas sav sca scc sce sco scp scr scs scv se- sea sec see seo sep ser ses sev soa soc soe soo sop sor sos sov spa spc spe spo spp spr sps spv sr- sra src sre sro srp srr srs srv ss- ssa ssc sse sso ssp ssr sss ssv sva svc sve svo svp svr svs svv v-a v-e vaa vac vae vao vap var vas vav vca vcc vce vco vcp vcr vcs vea vec vee veo vep ver ves voa voc voe voo vop vor vos vov vpa vpc vpe vpo vpp vpr vps vra vrc vre vrp vrr vrs vsa vsc vse vso vsp vsr vss vsv vva vvc vvo vvr vvs vvv