-er bbb bbe bbi bbm bbr be- beb bee bei bem ber bi- bib bie bii bim bir bmb bme bmi bmm bmr brb bre bri brm brr ebb ebe ebi ebm ebr eeb eee eem eer eib eie eii eim eir em- emb eme emi emm emr erb ere eri erm err ibb ibe ibi ibm ibr ie- iee iei iem ier iib iie iii iim iir im- imb ime imi imm ir- irb ire iri irm irr m-r mbb mbe mbi mbm mbr meb mee mei mem mer mi- mib mie mii mim mir mmb mme mmi mmm mmr mrb mre mri mrm mrr rbb rbe rbi rbm rbr re- reb ree rei rem rer rib rie rii rim rir rmb rme rmi rmm rmr rrb rri rrm rrr