bbb bbe bbi bbm bbs bbt be- beb bee bei bem bes bet bi- bib bie bii bim bis bit bmb bme bmi bmm bms bmt bsb bse bsi bsm bss bst btb bte bti btm bts btt ebb ebe ebi ebm ebs ebt eeb eee eem ees eet eib eie eii eim eis eit em- emb eme emi emm ems emt es- esb ese esi esm ess est etb ete eti etm ets ett ibb ibe ibi ibm ibs ibt ie- iee iei iem ies iet iib iie iii iim iis iit im- imb ime imi imm ims imt is- isb ise isi ism iss ist itb ite iti itm its itt mbb mbe mbi mbm mbs mbt meb mee mei mem mes met mi- mib mie mii mim mis mit mmb mme mmi mmm mms mmt msb mse msi msm mss mst mtb mte mti mtm mts mtt sbb sbe sbi sbm sbs sbt se- seb see sei sem ses set sib sie sii sim sis sit smb sme smi smm sms smt ss- ssb sse ssi ssm sss sst stb ste sti stm sts stt tbb tbe tbi tbm tbs tbt te- teb tee tei tem tes tet tib tie tii tim tis tit tmb tme tmi tmm tms tmt tsb tse tsi tsm tss tst ttb tte tti ttm tts ttt