-er a-a a-b a-i a-t aaa aab aae aag aai aan aar aat aau aax ab- aba abb abe abg abi abn abr abt abu abx aea aeb aee aeg aei aen aer aet aeu aex ag- aga agb age agg agi agn agr agt agu agx ai- aia aib aie aig aii ain air ait aiu aix an- ana anb ane ang ani ann anr ant anu anx ar- ara arb are arg ari arn arr art aru arx at- ata atb ate atg ati atn atr att atu atx au- aua aub aue aug aui aun aur aut aux ax- axa axe axi axn axr axt axx b-u baa bab bae bag bai ban bar bat bau bax bba bbb bbe bbg bbi bbn bbr bbt bbu bbx be- bea beb bee beg bei ben ber bet beu bex bga bgb bge bgg bgi bgn bgr bgt bgu bgx bi- bia bib bie big bii bin bir bit biu bix bna bnb bne bng bni bnn bnr bnt bnu bnx bra brb bre brg bri brn brr brt bru brx bta btb bte btg bti btn btr btt btu btx bua bub bue bug bui bun bur but buu bux bxb bxi bxn bxx eaa eab eae eag eai ean ear eat eau eax eba ebb ebe ebg ebi ebn ebr ebt ebu ebx eea eeb eee eeg een eer eet eex ega egb ege egg egi egn egr egt egu egx eia eib eie eig eii ein eir eit eiu eix 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 etx eu- eua eub eue eug eui eun eur eut eux ex- exa exe exi exr ext exu exx gaa gab gae gag gai gan gar gat gau gba gbe gbg gbi gbn gbr gbt gbu gbx ge- gea geb gee geg gei gen ger get geu gex 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 grx gta gtb gte gtg gti gtn gtr gtt gtu gtx gu- gua gub gue gug gui gun gur gut guu gxa gxt ia- iaa iab iae iag iai ian iar iat iau iba ibb ibe ibg ibi ibn ibr ibt ibu ibx ie- iea iee ieg iei ien ier iet iex iga igb ige igg igi ign igr igt igu iia iib iie iii iin iir iit iiu iix in- ina inb ine ing ini inn inr int inu inx ir- ira irb ire irg iri irn irr irt iru irx ita itb ite itg iti itn itt itu itx iu- iua iub iue iug iui iur iut ixe ixi ixn n-i naa nab nae nag nai nan nar nat nau nax nba nbb nbe nbg nbi nbn nbr nbt nbu nbx ne- nea neb nee neg nei nen ner net neu nex nga ngb nge ngg ngi ngn ngt ngu nia nib nie nig nii nin nir nit niu nix nna nnb nne nng nni nnn nnt nnu nra nrb nre nrg nri nrn nrr nrt nru nrx nta ntb nte ntg nti ntn ntr ntt ntu ntx nua nub nue nug nui nun nur nut nuu nux nxt ra- raa rab rae rag rai ran rar rat rau rax rba rbb rbe rbg rbi rbn rbr rbt rbu rbx re- rea reb ree reg rei ren rer ret reu rex rga rgb rge rgg rgi rgn rgr rgt rgx ria rib rie rig rii rin rir rit rix 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 rtx rua rub rue rug rui run rur rut ruu rux rxr t-x taa tab tae tag tai tan tar tat tau tax tba tbb tbe tbg tbi tbn tbr tbt tbu te- tea teb tee teg tei ten ter tet teu tex tga tgb tge tgg tgi tgn tgr tgt tgu tia tib tie tig tii tin tir tit tiu tix tna tnb tne tng tni tnn tnr tnt tnx tra trb tre trg tri trn trr trt tru trx tta ttb tte ttg tti ttn ttr ttt ttu ttx tua tub tue tug tui tun tur tut tuu tux txe txi txn txt txu ua- uaa uab uae uag uai uan uar uat uau uba ubb ube ubg ubi ubn ubr ubt ubu ubx uea ueb uee ueg uei uen uer uet uga ugb uge ugg ugi ugn ugr ugt ugu ugx uia uib uie uig uii uin uir uit uiu un- una unb une ung uni unn unr unt unu unx ur- ura urb ure urg uri urn urr urt uru urx uta utb ute uti utn utr utt utu utx uua uue uug uun uur uut uuu uxb uxr uxt uxu xaa xag xan xar xat xau xbe xbr xbx xee xeg xen xer xet xeu xex xge xgi xia xie xii xin xit xiu xix xna xnu xrt xrx xti xtr xtx xue xui xun xxi xxx