-er a-a a-b a-c aaa aab aac aae aag aam aan aar aau ab- aba abb abc abe abg abm abn abr abu ac- aca acb acc ace acg acm acn acr acu aea aeb aec aee aeg aem aen aer aeu ag- aga agb agc age agg agm agn agr agu ama amb amc ame amg amm amn amr amu an- ana anb anc ane ang anm ann anr anu ar- ara arb arc are arg arm arn arr aru au- aua aub auc aue aug aum aun aur b-u baa bab bac bae bag bam ban bar bau bba bbb bbc bbe bbg bbm bbn bbr bbu bca bcb bcc bce bcg bcm bcn bcr bcu be- bea beb bec bee beg bem ben ber beu bga bgb bgc bge bgg bgm bgn bgr bgu bma bmb bmc bme bmg bmm bmn bmr bmu bna bnb bnc bne bng bnn bnr bnu bra brb bre brg brm brn brr bru bua bub buc bue bug bum bun bur buu c-- caa cab cac cae cag cam can car cau cba cbb cbc cbe cbg cbm cbn cbr cbu cca ccb ccc cce ccg ccm ccn ccr ccu ce- cea ceb cec cee ceg cem cen cer ceu cga cgb cgc cge cgg cgm cgn cgr cgu cma cmb cmc cme cmg cmm cmn cmr cmu cn- cna cnb cnc cne cng cnm cnn cnr cnu cra crb crc cre crg crm crn crr cru cua cub cuc cue cug cum cun cur cuu eaa eab eac eae eag eam ean ear eau eba ebb ebc ebe ebg ebm ebn ebr ebu ec- eca ecb ecc ece ecg ecm ecn ecr ecu eea eeb eec eee eeg eem een eer ega egb egc ege egg egm egn egr egu em- ema emb emc eme emg emm emn emr emu en- ena enb enc ene eng enm enn enr enu era erb erc ere erg erm ern err eru eu- eua eub euc eue eug eun eur gaa gab gac gae gag gam gan gar gau gba gbc gbe gbg gbm gbn gbr gbu gca gcb gcc gce gcg gcm gcn gcr gcu ge- gea geb gec gee geg gem gen ger geu gga ggb ggc ggg ggm ggn ggr ggu gma gmb gmc gme gmg gmm gmn gmr gna gnb gnc gne gnm gnn gnr gnu gra grb grc gre grg grm grn grr gru gu- gua gub guc gue gug gum gun gur guu m-r maa mab mac mae mag mam man mar mau mba mbb mbc mbe mbg mbm mbr mbu mc- mca mcb mcc mce mcg mcm mcn mcr mcu mea meb mec mee meg mem men mer meu mga mgb mgc mge mgm mgn mgr mgu mma mmb mmc mme mmg mmm mmn mmr mmu mna mnb mnc mne mng mnm mnn mnr mnu mra mrb mrc mre mrg mrm mrn mrr mru mua mub muc mue mug mum mun mur muu naa nab nac nae nag nam nan nar nau nba nbb nbc nbe nbg nbm nbn nbr nbu nca ncb ncc nce ncg ncm ncn ncr ncu ne- nea neb nec nee neg nem nen ner neu nga ngb ngc nge ngg ngm ngn ngu nma nmb nmc nme nmg nmm nmn nmr nmu nna nnb nnc nne nng nnm nnn nnu nra nrb nrc nre nrg nrm nrn nrr nru nua nub nuc nue nug num nun nur nuu ra- raa rab rac rae rag ram ran rar rau rba rbb rbc rbe rbg rbm rbn rbr rbu rca rcb rcc rce rcg rcm rcn rcr rcu re- rea reb rec ree reg rem ren rer reu rga rgb rgc rge rgg rgn rgr rma rmb rmc rme rmg rmm rmn rmr rna rnb rnc rng rnm rnn rnr rnu rra rrb rrc rrg rrm rrn rrr rru rua rub ruc rue rug rum run rur ruu ua- uaa uab uac uae uag uam uan uar uau uba ubb ubc ube ubg ubn ubr ubu uca ucb ucc uce ucg ucm ucn ucr ucu uea ueb uec uee ueg uem uen uer uga ugb ugc uge ugg ugm ugn ugr ugu um- uma umb umc ume umg umm umn umr umu un- una unb unc une ung unm unn unr unu ur- ura urb urc ure urg urm urn urr uru uua uuc uue uug uum uun uur uuu