b-p bbb bbi bbk bbo bbp bbs bi- bib bii bik bio bip bis biz bkb bkk bko bkp bks bob boi bok boo bop bos boz bpb bpi bpo bpp bps bsb bsi bsk bso bsp bss bzo bzp bzs bzz ibb ibi ibk ibo ibp ibs ibz iib iii iio iip iis ikb iki ikk iko iks io- iob ioi ioo iop ios ipb ipi ipo ipp ips is- isb isi isk iso isp iss izi izo izz k-z kbb kbi kbk kbo kbp kbs kbz kib kii kik kio kip kis kiz kkb kki kkk kkp kks kob koi kok koo kop kos koz kpi kpk kpo kpp kps ksb ksi ksk kso ksp kss kzo o-i ob- obb obi obk obo obp obs oib oii oik oio oip ois oiz okb oki okk oko okp oks oo- oob ooi ook ooo oop oos op- opb opi opk opo opp ops os- osb osi osk oso osp oss ozo ozs ozz p-p pbb pbi pbk pbo pbp pbs pbz pib pii pik pio pip pis piz pkb pki pko pkp pks pob poi pok poo pop pos poz ppb ppi ppk ppo ppp pps ppz ps- psb psi psk pso psp pss pzk pzp sbb sbi sbk sbo sbp sbs sib sii sik sio sip sis sk- skb ski skk sko skp sks sob soi sok soo sop sos soz spb spi spk spo spp sps spz ss- ssb ssi ssk sso ssp sss ssz szi szp zbb zbs zib zik zio zip zis ziz zks zo- zob zoi zok zoo zos zpi zpo zpp zsi zsz zzs zzz