b-p bbb bbi bbo bbp bi- bib bii bio bip biz bob boi boo bop boz bpb bpi bpo bpp bzo bzp bzz ibb ibi ibo ibp ibz iib iii iio iip io- iob ioi ioo iop ipb ipi ipo ipp izi izo izz o-i ob- obb obi obo obp oib oii oio oip oiz oo- oob ooi ooo oop op- opb opi opo opp ozo ozz p-p pbb pbi pbo pbp pbz pib pii pio pip piz pob poi poo pop poz ppb ppi ppo ppp ppz pzp zbb zib zio zip ziz zo- zob zoi zoo zpi zpo zpp zzz