-er a-a a-c aaa aac aae aaf aak aao aar aaw ac- aca acc ace acf ack aco acr acw aea aec aee aef aek aeo aer aew af- afa afc afe aff afk afo afr afw aka akc ake akk ako akr akw aoa aoc aoe aof aok aoo aor aow ar- ara arc are arf ark aro arr arw aw- awa awc awe awf awk awo awr aww c-- caa cac cae caf cak cao car caw cca ccc cce ccf cck cco ccr ccw ce- cea cec cee cef cek ceo cer cew cfa cfc cfe cff cfk cfo cfr cfw cka ckc cko ckw co- coa coc coe cof cok coo cor cow cra crc cre crf crk cro crr crw cw- cwa cwc cwe cwk cwo cwr eaa eac eae eaf eak eao ear eaw ec- eca ecc ece ecf eck eco ecr ecw eea eec eee eef eek eeo eer eew ef- efa efc efe eff efo efr efw eka ekc eke ekf eko ekr eo- eoa eoc eoe eof eok eoo eor eow era erc ere erf erk ero err erw ewa ewc ewe ewf ewk ewo ewr eww faa fac fae faf fak fao far faw fca fcc fce fcf fck fco fcr fcw fea fec fee fef fek feo fer few ffa ffc ffe fff ffk ffo ffr ffw fka fkc fkf fkk foa foc foe fof fok foo for fow fra frc fre frf frk fro frr frw fwa fwc fwe fwf fwo ka- kaa kac kae kaf kak kao kar kaw kca kcc kce kck kcr ke- kea kec kee kef kek keo ker kew kfa kfc kff kfo kfw kkc kke kkk kkr koa koc koe kof kok koo kor kow kra krc krf krk kro krr krw kw- kwa kwc kwf kwk kwo kww oaa oac oae oaf oak oao oar oaw oc- oca occ ocf ock oco ocr ocw oea oec oee oef oeo oer of- ofa ofc ofe off ofo ofr ofw oka okc oke okk oko okr okw oo- ooa ooc oof ook ooo oor oow or- ora orc ore orf ork oro orr owa owc owe owf owk owo oww ra- raa rac rae raf rak rao rar raw rca rcc rce rcf rco rcr rcw re- rea rec ree ref rek reo rer rew rfa rfc rfe rff rfk rfo rfr rfw rkc rke rkf rkk rko roa roc roe rof rok roo ror row rra rrc rrf rrk rrr rwa rwc rwe rwf rwr waa wac wae waf wak wao war waw wca wcc wce wcf wck wco wcr wcw wea wec wee wef wek weo wer wew wfa wfc wfe wff wfk wfo wfr wfw wka wkc wke wkf wko wkr wkw woa woc woe wof wok woo wor wow wr- wra wrc wre wrf wrk wro wrr wrw wwa wwc wwe wwf wwo www