bbb bbd bbi bbk bbo bbt bby bdb bdd bdi bdk bdo bdt bdy bi- bib bid bii bik bio bit biy bkb bkk bko bkt bob bod boi bok boo bot boy btb btd bti btk bto btt bty by- byd byi byk byo byt dbb dbd dbi dbk dbo dbt dby ddb ddd ddi ddk ddo ddt ddy di- dib did dii dik dio dit diy dkb dki dkk dko dkt dob dod doi dok doo dot doy dtb dtd dti dtk dto dtt dty dy- dyb dyd dyk dyo dyy i-d ibb ibd ibi ibk ibo ibt iby idb idd idi idk ido idt idy iib iid iii iio iit ikb iki ikk iko ikt io- iob iod ioi ioo iot itb itd iti itk ito itt ity iyo iyt iyy k-t kbb kbd kbi kbk kbo kdb kdk kdo kdt kdy kib kid kii kik kio kit kkb kki kkk kkt kky kob kod koi kok koo kot koy ktb ktk kto ktt kyd kyo kyt o-i ob- obb obd obi obk obo obt oby odb odd odi odo odt oib oid oii oik oio oit okb okd oki okk oko oo- oob ood ooi ook ooo oot ot- otb otd oti otk oto ott oyd oyi oyo tbb tbd tbi tbk tbo tbt tdb tdd tdi tdk tdo tdt tdy tib tid tii tik tio tit tiy tkb tkk tko tkt tky to- tob tod toi tok too tot toy ttb ttd tti ttk tto ttt tty tyd tyo tyt ybi yby ydo ydt ydy yid yii yio yit yki ykk yob yod yoi yok yoo yot yoy ytd ytk yto ytt yyb yyt yyy