bbb bbe bbi bbm bbo bbs be- beb bee bei bem beo bes bi- bib bie bii bim bio bis bmb bme bmi bmm bmo bms bob boe boi bom boo bos bsb bse bsi bsm bso bss ebb ebe ebi ebm ebo ebs eeb eee eem eeo ees eib eie eii eim eio eis em- emb eme emi emm emo ems eo- eob eoe eoi eom eoo eos es- esb ese esi esm eso ess ibb ibe ibi ibm ibo ibs ie- iee iei iem ies iib iie iii iim iio iis im- imb ime imi imm imo ims io- iob ioe ioi iom ioo ios is- isb ise isi ism iso iss m-o mbb mbe mbi mbm mbo mbs meb mee mei mem meo mes mi- mib mie mii mim mio mis mmb mme mmi mmm mmo mms mob moe moi mom moo mos msb mse msi msm mso mss o-i ob- obb obe obi obm obo obs oeb oee oei oem oeo oes oib oie oii oim oio ois om- omb ome omi omm omo oms oo- oob ooi oom ooo oos os- osb ose osi osm oso oss sbb sbe sbi sbm sbo sbs se- seb see sei sem seo ses sib sie sii sim sio sis smb sme smi smm smo sms sob soe soi som soo sos ss- ssb sse ssi ssm sso sss