bbb bbe bbi bbk bbm bbo bbs bbt be- beb bee bei bek bem beo bes bet bi- bib bie bii bik bim bio bis bit bkb bke bkk bkm bko bks bkt bmb bme bmi bmk bmm bmo bms bmt bob boe boi bok bom boo bos bot bsb bse bsi bsk bsm bso bss bst btb bte bti btk btm bto bts btt ebb ebe ebi ebk ebm ebo ebs ebt eeb eee eek eem eeo ees eet eib eie eii eik eim eio eis eit ekb eke eki eko eks ekt em- emb eme emi emk emm emo ems emt eo- eob eoe eoi eok eom eoo eos eot es- esb ese esi esk esm eso ess est etb ete eti etk etm eto ets ett ibb ibe ibi ibk ibm ibo ibs ibt ie- iee iei iek iem ies iet iib iie iii iim iio iis iit ikb ike iki ikk iko iks ikt im- imb ime imi imm imo ims imt io- iob ioe ioi iom ioo ios iot is- isb ise isi isk ism iso iss ist itb ite iti itk itm ito its itt k-t kbb kbe kbi kbk kbm kbo kbs ke- keb kee kei kek kem keo kes ket kib kie kii kik kim kio kis kit kkb kke kki kkk kkm kks kkt kmb kme kmi kmk kmm kmo kms kmt kob koe koi kok kom koo kos kot ksb kse ksi ksk ksm kso kss kst ktb kte ktk ktm kto kts ktt m-o mbb mbe mbi mbk mbm mbo mbs mbt meb mee mei mek mem meo mes met mi- mib mie mii mik mim mio mis mit mkb mke mkk mkm mko mks mkt mmb mme mmi mmk mmm mmo mms mmt mob moe moi mok mom moo mos mot msb mse msi msk msm mso mss mst mtb mte mti mtk mtm mto mts mtt o-i ob- obb obe obi obk obm obo obs obt oeb oee oei oem oeo oes oet oib oie oii oik oim oio ois oit okb oke oki okk oko oks om- omb ome omi omm omo oms omt oo- oob ooi ook oom ooo oos oot os- osb ose osi osk osm oso oss ost ot- otb ote oti otk otm oto ots ott sbb sbe sbi sbk sbm sbo sbs sbt se- seb see sei sek sem seo ses set sib sie sii sik sim sio sis sit sk- skb ske ski skk skm sko sks skt smb sme smi smk smm smo sms smt sob soe soi sok som soo sos sot ss- ssb sse ssi ssk ssm sso sss sst stb ste sti stk stm sto sts stt tbb tbe tbi tbk tbm tbo tbs tbt te- teb tee tei tek tem teo tes tet tib tie tii tik tim tio tis tit tkb tke tkk tkm tko tks tkt tmb tme tmi tmk tmm tmo tms tmt to- tob toe toi tok tom too tos tot tsb tse tsi tsk tsm tso tss tst ttb tte tti ttk ttm tto tts ttt