b-p bbb bbi bbk bbo bbp bbr bby bi- bib bii bik bio bip bir biy bkb bkk bko bkp bkr bob boi bok boo bop bor boy bpb bpi bpo bpp bpr bpy brb bri brk bro brp brr bry by- byi byk byo byp byr ibb ibi ibk ibo ibp ibr iby iib iii iio iip iir ikb iki ikk iko ikr io- iob ioi ioo iop ior ipb ipi ipo ipp ipr ipy ir- irb iri irk iro irp irr iry iyo iyr iyy kbb kbi kbk kbo kbp kbr kib kii kik kio kip kir kkb kki kkk kkp kkr kky kob koi kok koo kop kor koy kpi kpk kpo kpp kpr kri krk kro krp krr kry kyo kyp kyr o-i ob- obb obi obk obo obp obr oby oib oii oik oio oip oir okb oki okk oko okp okr oo- oob ooi ook ooo oop oor op- opb opi opk opo opp opr opy or- orb ori ork oro orp orr ory oyi oyo p-p pbb pbi pbk pbo pbp pbr pby pib pii pik pio pip pir pkb pki pko pkp pkr pky pob poi pok poo pop por poy ppb ppi ppk ppo ppp ppr prb pri prk pro prp prr pry py- pyb pyk pyo pyr rbb rbi rbk rbo rbp rbr rib rii rik rio rip rir riy rkb rkk rko rkp rky rob roi rok roo rop ror roy rpb rpi rpk rpo rpp rpr rrb rri rrk rrp rrr ry- ryk ryo ryr ryy ybi ybp ybr yby yii yio yip yir yki ykk yob yoi yok yoo yop yor yoy ypo yro yrp yyb yyy