-er a-a a-c a-t a-z aaa aac aae aao aap aar aat aaz ac- aca acc ace aco acp acr act acz aea aec aee aeo aep aer aet aez aoa aoc aoe aoo aop aor aot ap- apa apc ape apo app apr apt ar- ara arc are aro arp arr art arz at- ata atc ate ato atp atr att atz az- aza aze azo azp azt azz c-- caa cac cae cao cap car cat caz cca ccc cce cco ccp ccr cct ccz ce- cea cec cee ceo cep cer cet cez co- coa coc coe coo cop cor cot coz cpa cpc cpe cpo cpp cpr cpt cpz cra crc cre cro crp crr crt crz cta ctc cte cto ctp ctr ctt ctz cz- czc cze czo czt eaa eac eae eao eap ear eat eaz ec- eca ecc ece eco ecr ect eea eec eee eeo eep eer eet eo- eoa eoc eoe eoo eop eor eot ep- epa epc epe epo epp epr ept epz era erc ere ero erp err ert erz eta etc ete eto etp etr ett etz eze ezo ezr ezz oaa oac oae oao oap oar oat oc- oca occ oco ocp ocr oct ocz oea oec oee oeo oep oer oet oo- ooa ooc ooo oop oor oot op- opa opc ope opo opp opr opt or- ora orc ore oro orp orr ort orz ot- ota otc ote oto otp otr ott otz oza oze ozo ozt ozz p-p paa pac pae pao pap par pat paz pca pcc pce pco pcp pcr pct pea pec pee peo pep per pet pez poa poc poe poo pop por pot poz ppa ppc ppe ppo ppp ppr ppt ppz pra prc pre pro prp prr prt prz pt- pta ptc pte pto ptp ptr ptt ptz pzc pzp pzt ra- raa rac rae rao rap rar rat raz rca rcc rce rco rcp rcr rct re- rea rec ree reo rep rer ret rez roa roc roe roo rop ror rot roz rpa rpc rpe rpo rpp rpr rpt rpz rra rrc rrp rrr rrt rta rtc rte rto rtp rtr rtt rtz rza rze rzo taa tac tae tao tap tar tat taz tca tcc tce tco tcp tcr tct te- tea tec tee teo tep ter tet tez to- toa toc toe too top tor tot toz tpa tpc tpe tpo tpp tpr tpt tpz tra trc tre tro trp trr trt trz tta ttc tte tto ttp ttr ttt tza tze zaa zac zao zap zar zat zaz zce zco zea zec zee zeo zep zer zet zez zo- zoa zoc zoe zoo zor zot zpc zpe zpo zpp zpr zpt zro zrp zta zte ztr zzr zzt zzz