-er a-a a-b a-c aaa aab aac aae aag aah aan aar aau ab- aba abb abc abe abg abh abn abr abu ac- aca acb acc ace acg ach acn acr acu aea aeb aec aee aeg aeh aen aer aeu ag- aga agb agc age agg agh agn agr agu aha ahb ahc ahe ahg ahh ahn ahr ahu an- ana anb anc ane ang anh ann anr anu ar- ara arb arc are arg arh arn arr aru au- aua aub auc aue aug auh aun aur b-u baa bab bac bae bag bah ban bar bau bba bbb bbc bbe bbg bbh bbn bbr bbu bca bcb bcc bce bcg bch bcn bcr bcu be- bea beb bec bee beg beh ben ber beu bga bgb bgc bge bgg bgh bgn bgr bgu bha bhb bhc bhe bhg bhh bhr bhu bna bnb bnc bne bng bnn bnr bnu bra brb bre brg brh brn brr bru bua bub buc bue bug buh bun bur buu c-- caa cab cac cae cag cah can car cau cba cbb cbc cbe cbg cbh cbn cbr cbu cca ccb ccc cce ccg cch ccn ccr ccu ce- cea ceb cec cee ceg ceh cen cer ceu cga cgb cgc cge cgg cgh cgn cgr cgu ch- cha chb chc che chg chh chn chr chu cn- cna cnb cnc cne cng cnh cnn cnr cnu cra crb crc cre crg crh crn crr cru cua cub cuc cue cug cuh cun cur cuu eaa eab eac eae eag eah ean ear eau eba ebb ebc ebe ebg ebh ebn ebr ebu ec- eca ecb ecc ece ecg ech ecn ecr ecu eea eeb eec eee eeg een eer ega egb egc ege egg egh egn egr egu eha ehb ehc ehe ehg ehh ehn ehr ehu en- ena enb enc ene eng enh enn enr enu era erb erc ere erg erh ern err eru eu- eua eub euc eue eug eun eur gaa gab gac gae gag gah gan gar gau gba gbc gbe gbg gbh gbn gbr gbu gca gcb gcc gce gcg gch gcn gcr gcu ge- gea geb gec gee geg geh gen ger geu gga ggb ggc ggg ggh ggn ggr ggu gha ghb ghc ghe ghg ghh ghn ghr gna gnb gnc gne gnn gnr gnu gra grb grc gre grg grh grn grr gru gu- gua gub guc gue gug gun gur guu haa hab hac hae hag hah han har hau hba hbb hbc hbe hbg hbh hbn hbr hbu hca hcb hcc hce hcg hch hcn hcr he- hea heb hec hee heg heh hen her heu hga hgb hgc hge hgg hgh hgn hgr hgu hha hhb hhc hhe hhg hhh hhn hhr hhu hna hnb hnc hne hng hnh hnn hnu hr- hra hrb hrc hre hrg hrh hrn hrr hru hua hub huc hue hug huh hun hur huu naa nab nac nae nag nah nan nar nau nba nbb nbc nbe nbg nbn nbr nbu nca ncb ncc nce ncg nch ncn ncr ncu ne- nea neb nec nee neg neh nen ner neu nga ngb ngc nge ngg ngh ngn ngu nha nhb nhc nhe nhg nhh nhn nhr nhu nna nnb nnc nne nng nnh nnn nnu nra nrb nrc nre nrg nrn nrr nru nua nub nuc nue nug nuh nun nur nuu ra- raa rab rac rae rag rah ran rar rau rba rbb rbc rbe rbg rbh rbn rbr rbu rca rcb rcc rce rcg rch rcn rcr rcu re- rea reb rec ree reg reh ren rer reu rga rgb rgc rge rgg rgh rgn rgr rh- rha rhb rhc rhe rhg rhh rhn rhr rhu rna rnb rnc rng rnh rnn rnr rnu rra rrb rrc rrg rrh rrn rrr rru rua rub ruc rue rug ruh run rur ruu ua- uaa uab uac uae uag uah uan uar uau uba ubb ubc ube ubg ubh ubn ubr ubu uca ucb ucc uce ucg uch ucn ucr ucu uea ueb uec uee ueg ueh uen uer uga ugb ugc uge ugg ugh ugn ugr ugu uha uhb uhc uhe uhh uhr uhu un- una unb unc une ung unh unn unr unu ur- ura urb urc ure urg urn urr uru uua uuc uue uug uun uur uuu