-er bbb bbe bbi bbm bbo bbr be- beb bee bei bem beo ber bi- bib bie bii bim bio bir bmb bme bmi bmm bmo bmr bob boe boi bom boo bor brb bre bri brm bro brr ebb ebe ebi ebm ebo ebr eeb eee eem eeo eer eib eie eii eim eio eir em- emb eme emi emm emo emr eo- eob eoe eoi eom eoo eor erb ere eri erm ero err ibb ibe ibi ibm ibo ibr ie- iee iei iem ier iib iie iii iim iio iir im- imb ime imi imm imo io- iob ioe ioi iom ioo ior ir- irb ire iri irm iro irr m-o m-r mbb mbe mbi mbm mbo mbr meb mee mei mem meo mer mi- mib mie mii mim mio mir mmb mme mmi mmm mmo mmr mob moe moi mom moo mor mrb mre mri mrm mro mrr o-i ob- obb obe obi obm obo obr oeb oee oei oem oeo oer oib oie oii oim oio oir om- omb ome omi omm omo omr oo- oob ooi oom ooo oor or- orb ore ori orm oro orr rbb rbe rbi rbm rbo rbr re- reb ree rei rem reo rer rib rie rii rim rio rir rmb rme rmi rmm rmo rmr rob roe roi rom roo ror rrb rri rrm rrr