-er a-a a-b a-i a-t aaa aab aae aai aam aan aar aat ab- aba abb abe abi abm abn abr abt aea aeb aee aei aem aen aer aet ai- aia aib aie aii aim ain air ait ama amb ame ami amm amn amr amt an- ana anb ane ani anm ann anr ant ar- ara arb are ari arm arn arr art at- ata atb ate ati atm atn atr att baa bab bae bai bam ban bar bat bba bbb bbe bbi bbm bbn bbr bbt be- bea beb bee bei bem ben ber bet bi- bia bib bie bii bim bin bir bit bma bmb bme bmi bmm bmn bmr bmt bna bnb bne bni bnn bnr bnt bra brb bre bri brm brn brr brt bta btb bte bti btm btn btr btt eaa eab eae eai eam ean ear eat eba ebb ebe ebi ebm ebn ebr ebt eea eeb eee eem een eer eet eia eib eie eii eim ein eir eit em- ema emb eme emi emm emn emr emt en- ena enb ene eni enm enn enr ent era erb ere eri erm ern err ert eta etb ete eti etm etn etr ett ia- iaa iab iae iai iam ian iar iat iba ibb ibe ibi ibm ibn ibr ibt ie- iea iee iei iem ien ier iet iia iib iie iii iim iin iir iit im- ima imb ime imi imm imn imt in- ina inb ine ini inm inn inr int ir- ira irb ire iri irm irn irr irt ita itb ite iti itm itn itt m-r maa mab mae mai mam man mar mat mba mbb mbe mbi mbm mbr mbt mea meb mee mei mem men mer met mi- mia mib mie mii mim min mir mit mma mmb mme mmi mmm mmn mmr mmt mna mnb mne mni mnm mnn mnr mnt mra mrb mre mri mrm mrn mrr mrt mta mtb mte mti mtm mtn mtr mtt n-i naa nab nae nai nam nan nar nat nba nbb nbe nbi nbm nbn nbr nbt ne- nea neb nee nei nem nen ner net nia nib nie nii nim nin nir nit nma nmb nme nmi nmm nmn nmr nmt nna nnb nne nni nnm nnn nnt nra nrb nre nri nrm nrn nrr nrt nta ntb nte nti ntm ntn ntr ntt ra- raa rab rae rai ram ran rar rat rba rbb rbe rbi rbm rbn rbr rbt re- rea reb ree rei rem ren rer ret ria rib rie rii rim rin rir rit rma rmb rme rmi rmm rmn rmr rmt rna rnb rni rnm rnn rnr rnt rra rrb rri rrm rrn rrr rrt rta rtb rte rti rtm rtn rtr rtt taa tab tae tai tam tan tar tat tba tbb tbe tbi tbm tbn tbr tbt te- tea teb tee tei tem ten ter tet tia tib tie tii tim tin tir tit tma tmb tme tmi tmm tmn tmr tmt tna tnb tne tni tnm tnn tnr tnt tra trb tre tri trm trn trr trt tta ttb tte tti ttm ttn ttr ttt