-er a-a a-c aaa aac aae aan aap aar aav ac- aca acc ace acn acp acr acv aea aec aee aen aep aer aev an- ana anc ane ann anp anr anv ap- apa apc ape apn app apr apv ar- ara arc are arn arp arr arv av- ava avc ave avn avp avr c-- caa cac cae can cap car cav cca ccc cce ccn ccp ccr ccv ce- cea cec cee cen cep cer cev cn- cna cnc cne cnn cnp cnr cnv cpa cpc cpe cpn cpp cpr cpv cra crc cre crn crp crr crv cva cvc cve cvn cvp cvr cvv eaa eac eae ean eap ear eav ec- eca ecc ece ecn ecr ecv eea eec eee een eep eer eev en- ena enc ene enn enp enr env ep- epa epc epe epn epp epr era erc ere ern erp err erv eva evc eve evn evp evr evv naa nac nae nan nap nar nav nca ncc nce ncn ncp ncr ncv ne- nea nec nee nen nep ner nev nna nnc nne nnn nnp nnv npa npc npe npn npp npr npv nra nrc nre nrn nrp nrr nrv nva nvc nve nvn nvp nvv p-p paa pac pae pan pap par pav pca pcc pce pcn pcp pcr pcv pea pec pee pen pep per pev pn- pna pnc pne pnn pnp pnr pnv ppa ppc ppe ppn ppp ppr ppv pra prc pre prn prp prr prv pva pvc pve pvn pvp pvr pvv ra- raa rac rae ran rap rar rav rca rcc rce rcn rcp rcr rcv re- rea rec ree ren rep rer rev rna rnc rnn rnp rnr rnv rpa rpc rpe rpn rpp rpr rpv rra rrc rrn rrp rrr rva rvc rve rvn rvp rvr rvv v-a v-e vaa vac vae van vap var vav vca vcc vce vcn vcp vcr vea vec vee ven vep ver vn- vna vnp vnr vnv vpa vpc vpe vpn vpp vpr vra vrc vre vrn vrp vrr vva vvc vvr vvv