-er a-a a-c a-z aaa aac aae aag aak aar aas aau aaz ac- aca acc ace acg ack acr acs acu acz aea aec aee aeg aek aer aes aeu aez ag- aga agc age agg agk agr ags agu agz aka akc ake akg akk akr aks aku ar- ara arc are arg ark arr ars aru arz as- asa asc ase asg ask asr ass asu asz au- aua auc aue aug auk aur aus auz az- aza aze azg azs azu azz c-- caa cac cae cag cak car cas cau caz cca ccc cce ccg cck ccr ccs ccu ccz ce- cea cec cee ceg cek cer ces ceu cez cga cgc cge cgg cgr cgs cgu cka ckc cks cra crc cre crg crk crr crs cru crz csa csc cse csg csk csr css csu csz cua cuc cue cug cuk cur cus cuu cuz cz- czc cze czk eaa eac eae eag eak ear eas eau eaz ec- eca ecc ece ecg eck ecr ecs ecu eea eec eee eeg eek eer ees ega egc ege egg egr egs egu eka ekc eke ekg ekr eks eku era erc ere erg erk err ers eru erz es- esa esc ese esg esk esr ess esu eu- eua euc eue eug eur eus eze ezr ezs ezz gaa gac gae gag gak gar gas gau gaz gca gcc gce gcg gck gcr gcs gcu ge- gea gec gee geg gek ger ges geu gez gga ggc ggg ggr ggs ggu ggz gka gks gra grc gre grg grk grr grs gru gsa gsc gse gsg gsk gsr gss gsu gu- gua guc gue gug guk gur gus guu guz gza gzr gzu k-z ka- kaa kac kae kag kak kar kas kau kaz kca kcc kce kcg kck kcr kcs kcu ke- kea kec kee keg kek ker kes kez kga kgc kgs kgu kkc kke kkk kkr kks kku kra krc krg krk krr krs kru ksa ksc kse ksg ksk ksr kss ksu kuc kue kug kuk kur kus kuu ra- raa rac rae rag rak rar ras rau raz rca rcc rce rcg rcr rcs rcu re- rea rec ree reg rek rer res reu rez rga rgc rge rgg rgk rgr rgs rkc rke rkg rkk rks rku rkz rra rrc rrg rrk rrr rrs rru rsa rsc rse rsg rsk rsr rss rsu rua ruc rue rug ruk rur rus ruu ruz rza rze saa sac sae sag sak sar sas sau saz sca scc sce scg sck scr scs scu se- sea sec see seg sek ser ses seu sez sga sgc sge sgg sgk sgr sgs sgu sk- ska skc ske skg skk skr sks sku sr- sra src sre srg srk srr srs ss- ssa ssc sse ssg ssk ssr sss ssu ssz sua suc sue sug suk sur sus suu suz sza sze szr szu ua- uaa uac uae uag uak uar uas uau uaz uca ucc uce ucg uck ucr ucs ucu uea uec uee ueg uer ues uga ugc uge ugg ugk ugr ugs ugu uka ukc uke ukk ukr uku ukz ur- ura urc ure urg urk urr urs uru urz usa usc use usg usk usr uss usu usz uua uuc uue uug uur uus uuu uza uzu z-g zaa zac zag zak zar zas zaz zce zcs zea zec zee zek zer zes zez zgg zgs zka zks zrs zsa zse zsg zsu zsz zuc zug zuk zur zus zuz zzr zzs zzz