-er a-a a-b aaa aab aad aae aam aar aas aau ab- aba abb abd abe abm abr abs abu ad- ada adb add ade adm adr ads adu aea aeb aed aee aem aer aes aeu ama amb amd ame amm amr ams amu ar- ara arb ard are arm arr ars aru as- asa asb asd ase asm asr ass asu au- aua aub aud aue aum aur aus b-u baa bab bad bae bam bar bas bau bba bbb bbd bbe bbm bbr bbs bbu bda bdb bdd bde bdm bdr bds bdu be- bea beb bed bee bem ber bes beu bma bmb bmd bme bmm bmr bms bmu bra brb brd bre brm brr brs bru bsa bsb bsd bse bsm bsr bss bsu bua bub bud bue bum bur bus buu daa dab dad dae dam dar das dau dba dbb dbd dbe dbm dbr dbs dbu dda ddb ddd dde ddm ddr dds ddu de- dea deb ded dee dem der des deu dma dmb dmd dme dmm dmr dms dmu dra drb drd dre drm drr drs dru dsa dsb dsd dse dsm dsr dss dsu dua dub dud due dum dur dus eaa eab ead eae eam ear eas eau eba ebb ebd ebe ebm ebr ebs ebu ed- eda edb edd ede edm edr eds edu eea eeb eed eee eem eer ees em- ema emb emd eme emm emr ems emu era erb erd ere erm err ers eru es- esa esb esd ese esm esr ess esu eu- eua eub eud eue eur eus m-r maa mab mad mae mam mar mas mau mba mbb mbd mbe mbm mbr mbs mbu mda mdb mdd mde mdm mdr mds mdu mea meb med mee mem mer mes meu mma mmb mmd mme mmm mmr mms mmu mra mrb mrd mre mrm mrr mrs mru msa msb msd mse msm msr mss msu mua mub mud mue mum mur mus muu ra- raa rab rad rae ram rar ras rau rba rbb rbd rbe rbm rbr rbs rbu rda rdb rdd rde rdm rdr rds rdu re- rea reb red ree rem rer res reu rma rmb rmd rme rmm rmr rms rra rrb rrd rrm rrr rrs rru rsa rsb rsd rse rsm rsr rss rsu rua rub rud rue rum rur rus ruu saa sab sad sae sam sar sas sau sba sbb sbd sbe sbm sbr sbs sbu sda sdb sdd sde sdm sdr sds sdu se- sea seb sed see sem ser ses seu sma smb smd sme smm smr sms smu sr- sra srb srd sre srm srr srs ss- ssa ssb ssd sse ssm ssr sss ssu sua sub sud sue sum sur sus suu ua- uaa uab uad uae uam uar uas uau uba ubb ube ubr ubs ubu uda udb udd ude udm udr uds udu uea ueb ued uee uem uer ues um- uma umb umd ume umm umr ums umu ur- ura urb urd ure urm urr urs uru usa usb usd use usm usr uss usu uua uue uum uur uus uuu