-er a-a a-c aaa aac aae aah aak aao aap aar ac- aca acc ace ach ack aco acp acr aea aec aee aeh aek aeo aep aer aha ahc ahe ahh ahk aho ahp ahr aka akc ake akh akk ako akp akr aoa aoc aoe aoh aok aoo aop aor ap- apa apc ape aph apk apo app apr ar- ara arc are arh ark aro arp arr c-- caa cac cae cah cak cao cap car cca ccc cce cch cck cco ccp ccr ce- cea cec cee ceh cek ceo cep cer ch- cha chc che chh chk cho chp chr cka ckc ckh cko co- coa coc coe coh cok coo cop cor cpa cpc cpe cph cpk cpo cpp cpr cra crc cre crh crk cro crp crr eaa eac eae eah eak eao eap ear ec- eca ecc ece ech eck eco ecr eea eec eee eek eeo eep eer eha ehc ehe ehh eho ehp ehr eka ekc eke ekh eko ekp ekr eo- eoa eoc eoe eoh eok eoo eop eor ep- epa epc epe eph epo epp epr era erc ere erh erk ero erp err haa hac hae hah hak hao hap har hca hcc hce hch hck hco hcp hcr he- hea hec hee heh hek heo hep her hha hhc hhe hhh hhk hho hhp hhr hka hkh hkk hko hkp hkr hoa hoc hoe hoh hok hoo hop hor hpa hpc hpe hph hpk hpo hpp hpr hr- hra hrc hre hrh hrk hro hrp hrr ka- kaa kac kae kah kak kao kap kar kca kcc kce kch kck kcp kcr ke- kea kec kee keh kek keo kep ker kha khe khh khk kho khr kkc kke kkh kkk kkp kkr koa koc koe koh kok koo kop kor kpa kpc kpe kph kpk kpo kpp kpr kra krc krk kro krp krr oaa oac oae oah oak oao oap oar oc- oca occ och ock oco ocp ocr oea oec oee oeh oeo oep oer oha ohc ohe ohh oho ohp ohr oka okc oke okk oko okp okr oo- ooa ooc ooh ook ooo oop oor op- opa opc ope oph opk opo opp opr or- ora orc ore orh ork oro orp orr p-p paa pac pae pah pak pao pap par pca pcc pce pch pck pco pcp pcr pea pec pee peh pek peo pep per pha phc phe phk pho php phr pka pkc pke pko pkp pkr poa poc poe poh pok poo pop por ppa ppc ppe pph ppk ppo ppp ppr pra prc pre prh prk pro prp prr ra- raa rac rae rah rak rao rap rar rca rcc rce rch rco rcp rcr re- rea rec ree reh rek reo rep rer rh- rha rhc rhe rhh rho rhp rhr rkc rke rkk rko rkp roa roc roe roh rok roo rop ror rpa rpc rpe rph rpk rpo rpp rpr rra rrc rrh rrk rrp rrr