-er a-a a-b a-i a-t aaa aab aae aai aam aan aar aas aat ab- aba abb abe abi abm abn abr abs abt aea aeb aee aei aem aen aer aes aet ai- aia aib aie aii aim ain air ais ait ama amb ame ami amm amn amr ams amt an- ana anb ane ani anm ann anr ans ant ar- ara arb are ari arm arn arr ars art as- asa asb ase asi asm asn asr ass ast at- ata atb ate ati atm atn atr ats att baa bab bae bai bam ban bar bas bat bba bbb bbe bbi bbm bbn bbr bbs bbt be- bea beb bee bei bem ben ber bes bet bi- bia bib bie bii bim bin bir bis bit bma bmb bme bmi bmm bmn bmr bms bmt bna bnb bne bni bnn bnr bns bnt bra brb bre bri brm brn brr brs brt bsa bsb bse bsi bsm bsn bsr bss bst bta btb bte bti btm btn btr bts btt eaa eab eae eai eam ean ear eas eat eba ebb ebe ebi ebm ebn ebr ebs ebt eea eeb eee eem een eer ees eet eia eib eie eii eim ein eir eis eit em- ema emb eme emi emm emn emr ems emt en- ena enb ene eni enm enn enr ens ent era erb ere eri erm ern err ers ert es- esa esb ese esi esm esn esr ess est eta etb ete eti etm etn etr ets ett ia- iaa iab iae iai iam ian iar ias iat iba ibb ibe ibi ibm ibn ibr ibs ibt ie- iea iee iei iem ien ier ies iet iia iib iie iii iim iin iir iis iit im- ima imb ime imi imm imn ims imt in- ina inb ine ini inm inn inr ins int ir- ira irb ire iri irm irn irr irs irt is- isa isb ise isi ism isn isr iss ist ita itb ite iti itm itn its itt m-r maa mab mae mai mam man mar mas mat mba mbb mbe mbi mbm mbr mbs mbt mea meb mee mei mem men mer mes met mi- mia mib mie mii mim min mir mis mit mma mmb mme mmi mmm mmn mmr mms mmt mna mnb mne mni mnm mnn mnr mns mnt mra mrb mre mri mrm mrn mrr mrs mrt msa msb mse msi msm msn msr mss mst mta mtb mte mti mtm mtn mtr mts mtt n-i naa nab nae nai nam nan nar nas nat nba nbb nbe nbi nbm nbn nbr nbs nbt ne- nea neb nee nei nem nen ner nes net nia nib nie nii nim nin nir nis nit nma nmb nme nmi nmm nmn nmr nms nmt nna nnb nne nni nnm nnn nns nnt nra nrb nre nri nrm nrn nrr nrs nrt nsa nsb nse nsi nsm nsn nsr nss nst nta ntb nte nti ntm ntn ntr nts ntt ra- raa rab rae rai ram ran rar ras rat rba rbb rbe rbi rbm rbn rbr rbs rbt re- rea reb ree rei rem ren rer res ret ria rib rie rii rim rin rir ris rit rma rmb rme rmi rmm rmn rmr rms rmt rna rnb rni rnm rnn rnr rns rnt rra rrb rri rrm rrn rrr rrs rrt rsa rsb rse rsi rsm rsn rsr rss rst rta rtb rte rti rtm rtn rtr rts rtt saa sab sae sai sam san sar sas sat sba sbb sbe sbi sbm sbn sbr sbs sbt se- sea seb see sei sem sen ser ses set sia sib sie sii sim sin sir sis sit sma smb sme smi smm smn smr sms smt sna snb sne sni snm snn snr sns snt sr- sra srb sre sri srm srn srr srs srt ss- ssa ssb sse ssi ssm ssn ssr sss sst sta stb ste sti stm stn str sts stt taa tab tae tai tam tan tar tas tat tba tbb tbe tbi tbm tbn tbr tbs tbt te- tea teb tee tei tem ten ter tes tet tia tib tie tii tim tin tir tis tit tma tmb tme tmi tmm tmn tmr tms tmt tna tnb tne tni tnm tnn tnr tns tnt tra trb tre tri trm trn trr trs trt tsa tsb tse tsi tsm tsn tsr tss tst tta ttb tte tti ttm ttn ttr tts ttt