-er a-a a-c aaa aac aae aah aak aao aar aav ac- aca acc ace ach ack aco acr acv aea aec aee aeh aek aeo aer aev aha ahc ahe ahh ahk aho ahr ahv aka akc ake akh akk ako akr akv aoa aoc aoe aoh aok aoo aor aov ar- ara arc are arh ark aro arr arv av- ava avc ave avh avk avo avr c-- caa cac cae cah cak cao car cav cca ccc cce cch cck cco ccr ccv ce- cea cec cee ceh cek ceo cer cev ch- cha chc che chh chk cho chr chv cka ckc ckh cko co- coa coc coe coh cok coo cor cov cra crc cre crh crk cro crr crv cva cvc cve cvh cvk cvo cvr cvv eaa eac eae eah eak eao ear eav ec- eca ecc ece ech eck eco ecr ecv eea eec eee eek eeo eer eev eha ehc ehe ehh eho ehr ehv eka ekc eke ekh eko ekr ekv eo- eoa eoc eoe eoh eok eoo eor era erc ere erh erk ero err erv eva evc eve evh evo evr evv haa hac hae hah hak hao har hav hca hcc hce hch hck hco hcr hcv he- hea hec hee heh hek heo her hev hha hhc hhe hhh hhk hho hhr hhv hka hkh hkk hko hkr hoa hoc hoe hoh hok hoo hor hov hr- hra hrc hre hrh hrk hro hrr hrv hv- hva hvc hvk hvo hvr hvv ka- kaa kac kae kah kak kao kar kav kca kcc kce kch kck kcr ke- kea kec kee keh kek keo ker kev kha khe khh khk kho khr khv kkc kke kkh kkk kkr kkv koa koc koe koh kok koo kor kra krc krk kro krr krv kva kvh kvk kvo kvr kvv oaa oac oae oah oak oao oar oav oc- oca occ och ock oco ocr ocv oea oec oee oeh oeo oer oha ohc ohe ohh oho ohr oka okc oke okk oko okr oo- ooa ooc ooh ook ooo oor oov or- ora orc ore orh ork oro orr orv ov- ova ovc ove ovh ovo ovv ra- raa rac rae rah rak rao rar rav rca rcc rce rch rco rcr rcv re- rea rec ree reh rek reo rer rev rh- rha rhc rhe rhh rho rhr rhv rkc rke rkk rko rkv roa roc roe roh rok roo ror rov rra rrc rrh rrk rrr rva rvc rve rvh rvo rvr rvv v-a v-e vaa vac vae vah vak vao var vav vca vcc vce vch vco vcr vea vec vee veh vek veo ver vh- vha vhc vhe vho vka voa voc voe voh vok voo vor vov vra vrc vre vrh vrk vrr vva vvc vvo vvr vvv