-er a-a a-b a-c a-z aaa aab aac aae aam aan aar aau aaz ab- aba abb abc abe abm abn abr abu abz ac- aca acb acc ace acm acn acr acu acz aea aeb aec aee aem aen aer aeu aez ama amb amc ame amm amn amr amu amz an- ana anb anc ane anm ann anr anu anz ar- ara arb arc are arm arn arr aru arz au- aua aub auc aue aum aun aur auz az- aza azb aze azm azn azu azz b-u baa bab bac bae bam ban bar bau baz bba bbb bbc bbe bbm bbn bbr bbu bca bcb bcc bce bcm bcn bcr bcu bcz be- bea beb bec bee bem ben ber beu bez bma bmb bmc bme bmm bmn bmr bmu bmz bna bnb bnc bne bnn bnr bnu bnz bra brb bre brm brn brr bru brz bua bub buc bue bum bun bur buu buz bza bze bzn bzr bzu bzz c-- caa cab cac cae cam can car cau caz cba cbb cbc cbe cbm cbn cbr cbu cbz cca ccb ccc cce ccm ccn ccr ccu ccz ce- cea ceb cec cee cem cen cer ceu cez cma cmb cmc cme cmm cmn cmr cmu cn- cna cnb cnc cne cnm cnn cnr cnu cra crb crc cre crm crn crr cru crz cua cub cuc cue cum cun cur cuu cuz cz- czc cze czm eaa eab eac eae eam ean ear eau eaz eba ebb ebc ebe ebm ebn ebr ebu ec- eca ecb ecc ece ecm ecn ecr ecu eea eeb eec eee eem een eer em- ema emb emc eme emm emn emr emu en- ena enb enc ene enm enn enr enu enz era erb erc ere erm ern err eru erz eu- eua eub euc eue eun eur eze ezr ezz m-r maa mab mac mae mam man mar mau maz mba mbb mbc mbe mbm mbr mbu mc- mca mcb mcc mce mcm mcn mcr mcu mcz mea meb mec mee mem men mer meu mez mma mmb mmc mme mmm mmn mmr mmu mmz mna mnb mnc mne mnm mnn mnr mnu mnz mra mrb mrc mre mrm mrn mrr mru mrz mua mub muc mue mum mun mur muu mza mzb mzm mzn naa nab nac nae nam nan nar nau naz nba nbb nbc nbe nbm nbn nbr nbu nca ncb ncc nce ncm ncn ncr ncu ne- nea neb nec nee nem nen ner neu nez nma nmb nmc nme nmm nmn nmr nmu nmz nna nnb nnc nne nnm nnn nnu nnz nra nrb nrc nre nrm nrn nrr nru nrz nua nub nuc nue num nun nur nuu nzb nze nzz ra- raa rab rac rae ram ran rar rau raz rba rbb rbc rbe rbm rbn rbr rbu rca rcb rcc rce rcm rcn rcr rcu re- rea reb rec ree rem ren rer reu rez rma rmb rmc rme rmm rmn rmr rna rnb rnc rnm rnn rnr rnu rnz rra rrb rrc rrm rrn rrr rru rua rub ruc rue rum run rur ruu ruz rza rzb rze rzm ua- uaa uab uac uae uam uan uar uau uaz uba ubb ubc ube ubn ubr ubu uca ucb ucc uce ucm ucn ucr ucu uea ueb uec uee uem uen uer um- uma umb umc ume umm umn umr umu un- una unb unc une unm unn unr unu ur- ura urb urc ure urm urn urr uru urz uua uuc uue uum uun uur uuu uza uzb uzu zaa zab zac zam zan zar zaz zbb zbc zbm zbr zce zea zeb zec zee zem zen zer zez zma zmb zmc zmm znc zne znn zub zuc zum zun zur zuz zzr zzz