-er a-a a-b a-i a-t aaa aab aae aag aai aan aar aat aau ab- aba abb abe abg abi abn abr abt abu aea aeb aee aeg aei aen aer aet aeu ag- aga agb age agg agi agn agr agt agu ai- aia aib aie aig aii ain air ait aiu an- ana anb ane ang ani ann anr ant anu ar- ara arb are arg ari arn arr art aru at- ata atb ate atg ati atn atr att atu au- aua aub aue aug aui aun aur aut b-u baa bab bae bag bai ban bar bat bau bba bbb bbe bbg bbi bbn bbr bbt bbu be- bea beb bee beg bei ben ber bet beu bga bgb bge bgg bgi bgn bgr bgt bgu bi- bia bib bie big bii bin bir bit biu bna bnb bne bng bni bnn bnr bnt bnu bra brb bre brg bri brn brr brt bru bta btb bte btg bti btn btr btt btu bua bub bue bug bui bun bur but buu eaa eab eae eag eai ean ear eat eau eba ebb ebe ebg ebi ebn ebr ebt ebu eea eeb eee eeg een eer eet ega egb ege egg egi egn egr egt egu eia eib eie eig eii ein eir eit eiu en- ena enb ene eng eni enn enr ent enu era erb ere erg eri ern err ert eru eta etb ete etg eti etn etr ett etu eu- eua eub eue eug eui eun eur eut gaa gab gae gag gai gan gar gat gau gba gbe gbg gbi gbn gbr gbt gbu ge- gea geb gee geg gei gen ger get geu gga ggb ggg ggi ggn ggr ggt ggu gia gib gie gig gii gin gir git giu gna gnb gne gni gnn gnr gnt gnu gra grb gre grg gri grn grr grt gru gta gtb gte gtg gti gtn gtr gtt gtu gu- gua gub gue gug gui gun gur gut guu ia- iaa iab iae iag iai ian iar iat iau iba ibb ibe ibg ibi ibn ibr ibt ibu ie- iea iee ieg iei ien ier iet iga igb ige igg igi ign igr igt igu iia iib iie iii iin iir iit iiu in- ina inb ine ing ini inn inr int inu ir- ira irb ire irg iri irn irr irt iru ita itb ite itg iti itn itt itu iu- iua iub iue iug iui iur iut n-i naa nab nae nag nai nan nar nat nau nba nbb nbe nbg nbi nbn nbr nbt nbu ne- nea neb nee neg nei nen ner net neu nga ngb nge ngg ngi ngn ngt ngu nia nib nie nig nii nin nir nit niu nna nnb nne nng nni nnn nnt nnu nra nrb nre nrg nri nrn nrr nrt nru nta ntb nte ntg nti ntn ntr ntt ntu nua nub nue nug nui nun nur nut nuu ra- raa rab rae rag rai ran rar rat rau rba rbb rbe rbg rbi rbn rbr rbt rbu re- rea reb ree reg rei ren rer ret reu rga rgb rge rgg rgi rgn rgr rgt ria rib rie rig rii rin rir rit rna rnb rng rni rnn rnr rnt rnu rra rrb rrg rri rrn rrr rrt rru rta rtb rte rtg rti rtn rtr rtt rtu rua rub rue rug rui run rur rut ruu taa tab tae tag tai tan tar tat tau tba tbb tbe tbg tbi tbn tbr tbt tbu te- tea teb tee teg tei ten ter tet teu tga tgb tge tgg tgi tgn tgr tgt tgu tia tib tie tig tii tin tir tit tiu tna tnb tne tng tni tnn tnr tnt tra trb tre trg tri trn trr trt tru tta ttb tte ttg tti ttn ttr ttt ttu tua tub tue tug tui tun tur tut tuu ua- uaa uab uae uag uai uan uar uat uau uba ubb ube ubg ubi ubn ubr ubt ubu uea ueb uee ueg uei uen uer uet uga ugb uge ugg ugi ugn ugr ugt ugu uia uib uie uig uii uin uir uit uiu un- una unb une ung uni unn unr unt unu ur- ura urb ure urg uri urn urr urt uru uta utb ute uti utn utr utt utu uua uue uug uun uur uut uuu