-er a-a a-b a-i a-t aaa aab aae aai aam aar aat aau ab- aba abb abe abi abm abr abt abu aea aeb aee aei aem aer aet aeu ai- aia aib aie aii aim air ait aiu ama amb ame ami amm amr amt amu ar- ara arb are ari arm arr art aru at- ata atb ate ati atm atr att atu au- aua aub aue aui aum aur aut b-u baa bab bae bai bam bar bat bau bba bbb bbe bbi bbm bbr bbt bbu be- bea beb bee bei bem ber bet beu bi- bia bib bie bii bim bir bit biu bma bmb bme bmi bmm bmr bmt bmu bra brb bre bri brm brr brt bru bta btb bte bti btm btr btt btu bua bub bue bui bum bur but buu eaa eab eae eai eam ear eat eau eba ebb ebe ebi ebm ebr ebt ebu eea eeb eee eem eer eet eia eib eie eii eim eir eit eiu em- ema emb eme emi emm emr emt emu era erb ere eri erm err ert eru eta etb ete eti etm etr ett etu eu- eua eub eue eui eur eut ia- iaa iab iae iai iam iar iat iau iba ibb ibe ibi ibm ibr ibt ibu ie- iea iee iei iem ier iet iia iib iie iii iim iir iit iiu im- ima imb ime imi imm imt imu ir- ira irb ire iri irm irr irt iru ita itb ite iti itm itt itu iu- iua iub iue iui ium iur iut m-r maa mab mae mai mam mar mat mau mba mbb mbe mbi mbm mbr mbt mbu mea meb mee mei mem mer met meu mi- mia mib mie mii mim mir mit miu mma mmb mme mmi mmm mmr mmt mmu mra mrb mre mri mrm mrr mrt mru mta mtb mte mti mtm mtr mtt mtu mua mub mue mui mum mur mut muu ra- raa rab rae rai ram rar rat rau rba rbb rbe rbi rbm rbr rbt rbu re- rea reb ree rei rem rer ret reu ria rib rie rii rim rir rit rma rmb rme rmi rmm rmr rmt rra rrb rri rrm rrr rrt rru rta rtb rte rti rtm rtr rtt rtu rua rub rue rui rum rur rut ruu taa tab tae tai tam tar tat tau tba tbb tbe tbi tbm tbr tbt tbu te- tea teb tee tei tem ter tet teu tia tib tie tii tim tir tit tiu tma tmb tme tmi tmm tmr tmt tmu tra trb tre tri trm trr trt tru tta ttb tte tti ttm ttr ttt ttu tua tub tue tui tum tur tut tuu ua- uaa uab uae uai uam uar uat uau uba ubb ube ubi ubr ubt ubu uea ueb uee uei uem uer uet uia uib uie uii uim uir uit uiu um- uma umb ume umi umm umr umt umu ur- ura urb ure uri urm urr urt uru uta utb ute uti utm utr utt utu uua uue uum uur uut uuu