bbb bbd bbi bbk bbo bbs bbt bdb bdd bdi bdk bdo bds bdt bi- bib bid bii bik bio bis bit bkb bkk bko bks bkt bob bod boi bok boo bos bot bsb bsd bsi bsk bso bss bst btb btd bti btk bto bts btt dbb dbd dbi dbk dbo dbs dbt ddb ddd ddi ddk ddo dds ddt di- dib did dii dik dio dis dit dkb dki dkk dko dks dkt dob dod doi dok doo dos dot dsb dsd dsi dsk dso dss dst dtb dtd dti dtk dto dts dtt i-d ibb ibd ibi ibk ibo ibs ibt idb idd idi idk ido ids idt iib iid iii iio iis iit ikb iki ikk iko iks ikt io- iob iod ioi ioo ios iot is- isb isd isi isk iso iss ist itb itd iti itk ito its itt k-t kbb kbd kbi kbk kbo kbs kdb kdk kdo kds kdt kib kid kii kik kio kis kit kkb kki kkk kks kkt kob kod koi kok koo kos kot ksb ksd ksi ksk kso kss kst ktb ktk kto kts ktt o-i ob- obb obd obi obk obo obs obt odb odd odi odo ods odt oib oid oii oik oio ois oit okb okd oki okk oko oks oo- oob ood ooi ook ooo oos oot os- osb osd osi osk oso oss ost ot- otb otd oti otk oto ots ott sbb sbd sbi sbk sbo sbs sbt sdb sdd sdi sdk sdo sds sdt sib sid sii sik sio sis sit sk- skb skd ski skk sko sks skt sob sod soi sok soo sos sot ss- ssb ssd ssi ssk sso sss sst stb std sti stk sto sts stt tbb tbd tbi tbk tbo tbs tbt tdb tdd tdi tdk tdo tds tdt tib tid tii tik tio tis tit tkb tkk tko tks tkt to- tob tod toi tok too tos tot tsb tsd tsi tsk tso tss tst ttb ttd tti ttk tto tts ttt