bbb bbi bbk bbm bbo bbs bi- bib bii bik bim bio bis bkb bkk bkm bko bks bmb bmi bmk bmm bmo bms bob boi bok bom boo bos bsb bsi bsk bsm bso bss ibb ibi ibk ibm ibo ibs iib iii iim iio iis ikb iki ikk iko iks im- imb imi imm imo ims io- iob ioi iom ioo ios is- isb isi isk ism iso iss kbb kbi kbk kbm kbo kbs kib kii kik kim kio kis kkb kki kkk kkm kks kmb kmi kmk kmm kmo kms kob koi kok kom koo kos ksb ksi ksk ksm kso kss m-o mbb mbi mbk mbm mbo mbs mi- mib mii mik mim mio mis mkb mkk mkm mko mks mmb mmi mmk mmm mmo mms mob moi mok mom moo mos msb msi msk msm mso mss o-i ob- obb obi obk obm obo obs oib oii oik oim oio ois okb oki okk oko oks om- omb omi omm omo oms oo- oob ooi ook oom ooo oos os- osb osi osk osm oso oss sbb sbi sbk sbm sbo sbs sib sii sik sim sio sis sk- skb ski skk skm sko sks smb smi smk smm smo sms sob soi sok som soo sos ss- ssb ssi ssk ssm sso sss