-er a-a a-c a-z aaa aac aae aar aas aau aaz ac- aca acc ace acr acs acu acz aea aec aee aer aes aeu aez ar- ara arc are arr ars aru arz as- asa asc ase asr ass asu asz au- aua auc aue aur aus auz az- aza aze azs azu azz c-- caa cac cae car cas cau caz cca ccc cce ccr ccs ccu ccz ce- cea cec cee cer ces ceu cez cra crc cre crr crs cru crz csa csc cse csr css csu csz cua cuc cue cur cus cuu cuz cz- czc cze eaa eac eae ear eas eau eaz ec- eca ecc ece ecr ecs ecu eea eec eee eer ees era erc ere err ers eru erz es- esa esc ese esr ess esu eu- eua euc eue eur eus eze ezr ezs ezz ra- raa rac rae rar ras rau raz rca rcc rce rcr rcs rcu re- rea rec ree rer res reu rez rra rrc rrr rrs rru rsa rsc rse rsr rss rsu rua ruc rue rur rus ruu ruz rza rze saa sac sae sar sas sau saz sca scc sce scr scs scu se- sea sec see ser ses seu sez sr- sra src sre srr srs ss- ssa ssc sse ssr sss ssu ssz sua suc sue sur sus suu suz sza sze szr szu ua- uaa uac uae uar uas uau uaz uca ucc uce ucr ucs ucu uea uec uee uer ues ur- ura urc ure urr urs uru urz usa usc use usr uss usu usz uua uuc uue uur uus uuu uza uzu zaa zac zar zas zaz zce zcs zea zec zee zer zes zez zrs zsa zse zsu zsz zuc zur zus zuz zzr zzs zzz