-er a-a a-c aaa aac aae aag aan aao aap aar aav ac- aca acc ace acg acn aco acp acr acv aea aec aee aeg aen aeo aep aer aev ag- aga agc age agg agn ago agp agr agv an- ana anc ane ang ann ano anp anr anv aoa aoc aoe aog aon aoo aop aor aov ap- apa apc ape apg apn apo app apr apv ar- ara arc are arg arn aro arp arr arv av- ava avc ave avg avn avo avp avr c-- caa cac cae cag can cao cap car cav cca ccc cce ccg ccn cco ccp ccr ccv ce- cea cec cee ceg cen ceo cep cer cev cga cgc cge cgg cgn cgo cgp cgr cgv cn- cna cnc cne cng cnn cno cnp cnr cnv co- coa coc coe cog con coo cop cor cov cpa cpc cpe cpg cpn cpo cpp cpr cpv cra crc cre crg crn cro crp crr crv cva cvc cve cvg cvn cvo cvp cvr cvv eaa eac eae eag ean eao eap ear eav ec- eca ecc ece ecg ecn eco ecr ecv eea eec eee eeg een eeo eep eer eev ega egc ege egg egn ego egp egr en- ena enc ene eng enn eno enp enr env eo- eoa eoc eoe eog eon eoo eop eor ep- epa epc epe epg epn epo epp epr era erc ere erg ern ero erp err erv eva evc eve evg evn evo evp evr evv g-p gaa gac gae gag gan gao gap gar gav gca gcc gce gcg gcn gco gcp gcr ge- gea gec gee geg gen geo gep ger gev gga ggc ggg ggn ggo ggp ggr ggv gna gnc gne gnn gno gnp gnr gnv goa goc goe gog gon goo gop gor gov gpa gpc gpe gpg gpn gpo gpp gpr gra grc gre grg grn gro grp grr grv gva gvc gve gvg gvn gvo gvp gvr naa nac nae nag nan nao nap nar nav nca ncc nce ncg ncn nco ncp ncr ncv ne- nea nec nee neg nen neo nep ner nev nga ngc nge ngg ngn ngo ngp nna nnc nne nng nnn nno nnp nnv no- noa noc noe nog non noo nop nor nov npa npc npe npg npn npo npp npr npv nra nrc nre nrg nrn nro nrp nrr nrv nva nvc nve nvg nvn nvp nvv oaa oac oae oag oan oao oap oar oav oc- oca occ ocg ocn oco ocp ocr ocv oea oec oee oeg oen oeo oep oer oga ogc oge ogg ogn ogo ogp on- ona onc one ong onn ono onp onr oo- ooa ooc oog oon ooo oop oor oov op- opa opc ope opg opn opo opp opr opv or- ora orc ore org orn oro orp orr orv ov- ova ovc ove ovo ovp ovv p-p paa pac pae pag pan pao pap par pav pca pcc pce pcg pcn pco pcp pcr pcv pea pec pee peg pen peo pep per pev pga pgc pge pgg pgn pgo pgp pgr pgv pn- pna pnc pne png pnn pno pnp pnr pnv poa poc poe pog pon poo pop por pov ppa ppc ppe ppg ppn ppo ppp ppr ppv pra prc pre prg prn pro prp prr prv pva pvc pve pvg pvn pvo pvp pvr pvv ra- raa rac rae rag ran rao rap rar rav rca rcc rce rcg rcn rco rcp rcr rcv re- rea rec ree reg ren reo rep rer rev rga rgc rge rgg rgn rgo rgp rgr rgv rna rnc rng rnn rno rnp rnr rnv roa roc roe rog ron roo rop ror rov rpa rpc rpe rpg rpn rpo rpp rpr rpv rra rrc rrg rrn rrp rrr rva rvc rve rvg rvn rvo rvp rvr rvv v-a v-e vaa vac vae vag van vao vap var vav vca vcc vce vcn vco vcp vcr vea vec vee veg ven veo vep ver vga vgc vgg vgn vgo vgp vgr vn- vna vng vno vnp vnr vnv voa voc voe vog von voo vop vor vov vpa vpc vpe vpg vpn vpo vpp vpr vra vrc vre vrg vrn vrp vrr vva vvc vvg vvo vvr vvv