b-p bbb bbi bbk bbo bbp bbr bby bi- bib bii bik bio bip bir biy biz bkb bkk bko bkp bkr bob boi bok boo bop bor boy boz bpb bpi bpo bpp bpr bpy brb bri brk bro brp brr bry brz by- byi byk byo byp byr byz bzo bzp bzr bzz ibb ibi ibk ibo ibp ibr iby ibz 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 izi izo izy izz k-z kbb kbi kbk kbo kbp kbr kbz kib kii kik kio kip kir kiz kkb kki kkk kkp kkr kky kob koi kok koo kop kor koy koz kpi kpk kpo kpp kpr kri krk kro krp krr kry kyo kyp kyr kyz kzo kzy o-i ob- obb obi obk obo obp obr oby oib oii oik oio oip oir oiz 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 orz oyi oyo ozo ozz p-p pbb pbi pbk pbo pbp pbr pby pbz pib pii pik pio pip pir piz pkb pki pko pkp pkr pky pob poi pok poo pop por poy poz ppb ppi ppk ppo ppp ppr ppz prb pri prk pro prp prr pry prz py- pyb pyk pyo pyr pzk pzp rbb rbi rbk rbo rbp rbr rib rii rik rio rip rir riy riz rkb rkk rko rkp rky rkz rob roi rok roo rop ror roy roz rpb rpi rpk rpo rpp rpr rpz rrb rri rrk rrp rrr ry- ryk ryo ryr ryy ryz rzb rzo rzy ybi ybp ybr yby ybz yii yio yip yir yiz yki ykk yob yoi yok yoo yop yor yoy ypo yro yrp yyb yyy yyz yzb yzr yzy zbb zbr zby zib zik zio zip zir ziz zo- zob zoi zok zoo zor zpi zpo zpp zpr zro zrp zzr zzy zzz