bbb bbd bbi bbo bbs bbt bdb bdd bdi bdo bds bdt bi- bib bid bii bio bis bit bob bod boi boo bos bot bsb bsd bsi bso bss bst btb btd bti bto bts btt dbb dbd dbi dbo dbs dbt ddb ddd ddi ddo dds ddt di- dib did dii dio dis dit dob dod doi doo dos dot dsb dsd dsi dso dss dst dtb dtd dti dto dts dtt i-d ibb ibd ibi ibo ibs ibt idb idd idi ido ids idt iib iid iii iio iis iit io- iob iod ioi ioo ios iot is- isb isd isi iso iss ist itb itd iti ito its itt o-i ob- obb obd obi obo obs obt odb odd odi odo ods odt oib oid oii oio ois oit oo- oob ood ooi ooo oos oot os- osb osd osi oso oss ost ot- otb otd oti oto ots ott sbb sbd sbi sbo sbs sbt sdb sdd sdi sdo sds sdt sib sid sii sio sis sit sob sod soi soo sos sot ss- ssb ssd ssi sso sss sst stb std sti sto sts stt tbb tbd tbi tbo tbs tbt tdb tdd tdi tdo tds tdt tib tid tii tio tis tit to- tob tod toi too tos tot tsb tsd tsi tso tss tst ttb ttd tti tto tts ttt