-er b-u bbb bbe bbi bbm bbr bbu be- beb bee bei bem ber beu bi- bib bie bii bim bir biu bmb bme bmi bmm bmr bmu brb bre bri brm brr bru bub bue bui bum bur buu ebb ebe ebi ebm ebr ebu eeb eee eem eer eib eie eii eim eir eiu em- emb eme emi emm emr emu erb ere eri erm err eru eu- eub eue eui eur ibb ibe ibi ibm ibr ibu ie- iee iei iem ier iib iie iii iim iir iiu im- imb ime imi imm imu ir- irb ire iri irm irr iru iu- iub iue iui ium iur m-r mbb mbe mbi mbm mbr mbu meb mee mei mem mer meu mi- mib mie mii mim mir miu mmb mme mmi mmm mmr mmu mrb mre mri mrm mrr mru mub mue mui mum mur muu rbb rbe rbi rbm rbr rbu re- reb ree rei rem rer reu rib rie rii rim rir rmb rme rmi rmm rmr rrb rri rrm rrr rru rub rue rui rum rur ruu ubb ube ubi ubr ubu ueb uee uei uem uer uib uie uii uim uir uiu um- umb ume umi umm umr umu ur- urb ure uri urm urr uru uue uum uur uuu