-er a-a a-c aaa aac aad aae aak aap aar aav ac- aca acc acd ace ack acp acr acv ad- ada adc add ade adk adp adr adv aea aec aed aee aek aep aer aev aka akc akd ake akk akp akr akv ap- apa apc apd ape apk app apr apv ar- ara arc ard are ark arp arr arv av- ava avc avd ave avk avp avr c-- caa cac cad cae cak cap car cav cca ccc ccd cce cck ccp ccr ccv cda cdc cdd cde cdk cdp cdr cdv ce- cea cec ced cee cek cep cer cev cka ckc ckd cpa cpc cpd cpe cpk cpp cpr cpv cra crc crd cre crk crp crr crv cva cvc cvd cve cvk cvp cvr cvv daa dac dad dae dak dap dar dav dca dcc dcd dce dck dcp dcr dcv dda ddc ddd dde ddk ddp ddr de- dea dec ded dee dek dep der dev dka dkc dke dkk dkp dkr dpa dpc dpd dpe dpk dpp dpr dpv dra drc drd dre drk drp drr drv dva dvc dvd dve dvk dvp dvr eaa eac ead eae eak eap ear eav ec- eca ecc ecd ece eck ecr ecv ed- eda edc edd ede edk edp edr eea eec eed eee eek eep eer eev eka ekc ekd eke ekp ekr ekv ep- epa epc epd epe epp epr era erc erd ere erk erp err erv eva evc evd eve evp evr evv ka- kaa kac kad kae kak kap kar kav kca kcc kcd kce kck kcp kcr kda kdc kde kdk kdp kdr ke- kea kec ked kee kek kep ker kev kkc kke kkk kkp kkr kkv kpa kpc kpd kpe kpk kpp kpr kpv kra krc krd krk krp krr krv kva kvk kvp kvr kvv p-p paa pac pad pae pak pap par pav pca pcc pcd pce pck pcp pcr pcv pda pdc pdd pde pdk pdp pdr pdv pea pec ped pee pek pep per pev pka pkc pkd pke pkp pkr ppa ppc ppd ppe ppk ppp ppr ppv pra prc prd pre prk prp prr prv pva pvc pvd pve pvk pvp pvr pvv ra- raa rac rad rae rak rap rar rav rca rcc rcd rce rcp rcr rcv rda rdc rdd rde rdp rdr rdv re- rea rec red ree rek rep rer rev rkc rke rkk rkp rkv rpa rpc rpd rpe rpk rpp rpr rpv rra rrc rrd rrk rrp rrr rva rvc rvd rve rvp rvr rvv v-a v-e vaa vac vad vae vak vap var vav vca vcc vcd vce vcp vcr vdc vdd vde vdk vdp vdr vdv vea vec ved vee vek vep ver vka vkp vpa vpc vpd vpe vpk vpp vpr vra vrc vrd vre vrk vrp vrr vva vvc vvr vvv