-er bbb bbe bbi bbm bbr be- beb bee bei bem ber bez bi- bib bie bii bim bir biz bmb bme bmi bmm bmr bmz brb bre bri brm brr brz bze bzr bzz 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 erz eze ezr ezz ibb ibe ibi ibm ibr ibz ie- iee iei iem ier iib iie iii iim iir im- imb ime imi imm imz ir- irb ire iri irm irr ize izi izm izz m-r mbb mbe mbi mbm mbr meb mee mei mem mer mez mi- mib mie mii mim mir miz mmb mme mmi mmm mmr mmz mrb mre mri mrm mrr mrz mzb mzi mzm rbb rbe rbi rbm rbr re- reb ree rei rem rer rez rib rie rii rim rir riz rmb rme rmi rmm rmr rrb rri rrm rrr rzb rze rzm zbb zbm zbr zeb zee zem zer zez zib zie zim zir ziz zmb zmm zzr zzz