-th bbb bbh bbk bbo bbt bby bhb bhh bhk bho bht bkb bkk bko bkt bob boh bok boo bot boy btb bth btk bto btt bty by- byh byk byo byt hbb hbh hbk hbo hbt hby hhb hhh hhk hho hht hhy hkb hkh hkk hko hkt hob hoh hok hoo hot hoy htb hth htk hto htt hty hy- hyb hyh hyo hyt hyy k-t kbb kbh kbk kbo khh khk kho kkb kkh kkk kkt kky kob koh kok koo kot koy ktb kth ktk kto ktt kyo kyt ob- obb obh obk obo obt oby ohh oho oht okb okk oko oo- oob ooh ook ooo oot ot- otb oth otk oto ott oyo tbb tbh tbk tbo tbt th- thb thh thk tho tht thy tkb tkk tko tkt tky to- tob toh tok too tot toy ttb tth ttk tto ttt tty tyo tyt yby yht ykk yob yok yoo yot yoy yth ytk yto ytt yyb yyt yyy