-er a-a a-b a-i a-t aaa aab aae aai aan aar aat aau ab- aba abb abe abi abn abr abt abu aea aeb aee aei aen aer aet aeu ai- aia aib aie aii ain air ait aiu an- ana anb ane ani ann anr ant anu ar- ara arb are ari arn arr art aru at- ata atb ate ati atn atr att atu au- aua aub aue aui aun aur aut b-u baa bab bae bai ban bar bat bau bba bbb bbe bbi bbn bbr bbt bbu be- bea beb bee bei ben ber bet beu bi- bia bib bie bii bin bir bit biu bna bnb bne bni bnn bnr bnt bnu bra brb bre bri brn brr brt bru bta btb bte bti btn btr btt btu bua bub bue bui bun bur but buu eaa eab eae eai ean ear eat eau eba ebb ebe ebi ebn ebr ebt ebu eea eeb eee een eer eet eia eib eie eii ein eir eit eiu en- ena enb ene eni enn enr ent enu era erb ere eri ern err ert eru eta etb ete eti etn etr ett etu eu- eua eub eue eui eun eur eut ia- iaa iab iae iai ian iar iat iau iba ibb ibe ibi ibn ibr ibt ibu ie- iea iee iei ien ier iet iia iib iie iii iin iir iit iiu in- ina inb ine ini inn inr int inu ir- ira irb ire iri irn irr irt iru ita itb ite iti itn itt itu iu- iua iub iue iui iur iut n-i naa nab nae nai nan nar nat nau nba nbb nbe nbi nbn nbr nbt nbu ne- nea neb nee nei nen ner net neu nia nib nie nii nin nir nit niu nna nnb nne nni nnn nnt nnu nra nrb nre nri nrn nrr nrt nru nta ntb nte nti ntn ntr ntt ntu nua nub nue nui nun nur nut nuu ra- raa rab rae rai ran rar rat rau rba rbb rbe rbi rbn rbr rbt rbu re- rea reb ree rei ren rer ret reu ria rib rie rii rin rir rit rna rnb rni rnn rnr rnt rnu rra rrb rri rrn rrr rrt rru rta rtb rte rti rtn rtr rtt rtu rua rub rue rui run rur rut ruu taa tab tae tai tan tar tat tau tba tbb tbe tbi tbn tbr tbt tbu te- tea teb tee tei ten ter tet teu tia tib tie tii tin tir tit tiu tna tnb tne tni tnn tnr tnt tra trb tre tri trn trr trt tru tta ttb tte tti ttn ttr ttt ttu tua tub tue tui tun tur tut tuu ua- uaa uab uae uai uan uar uat uau uba ubb ube ubi ubn ubr ubt ubu uea ueb uee uei uen uer uet uia uib uie uii uin uir uit uiu un- una unb une uni unn unr unt unu ur- ura urb ure uri urn urr urt uru uta utb ute uti utn utr utt utu uua uue uun uur uut uuu