a-a a-b a-i aaa aab aai aak aap aas aay ab- aba abb abi abk abp abs aby ai- aia aib aii aik aip ais aiy aka akb aki akk akp aks ap- apa apb api apk app aps apy as- asa asb asi ask asp ass asy ay- aya ayi ayk ayp ays b-p baa bab bai bak bap bas bay bba bbb bbi bbk bbp bbs bby bi- bia bib bii bik bip bis biy bka bkb bkk bkp bks bpa bpb bpi bpp bps bpy bsa bsb bsi bsk bsp bss bsy by- bya byi byk byp bys ia- iaa iab iai iap ias iba ibb ibi ibk ibp ibs iby iia iib iii iip iis ika ikb iki ikk iks ipa ipb ipi ipp ips ipy is- isa isb isi isk isp iss isy iya iys iyy ka- kaa kab kai kak kap kas kay kba kbb kbi kbk kbp kbs kia kib kii kik kip kis kkb kki kkk kkp kks kky kpa kpi kpk kpp kps ksa ksb ksi ksk ksp kss kya kyp kys p-p paa pab pai pak pap pas pay pba pbb pbi pbk pbp pbs pby pia pib pii pik pip pis pka pkb pki pkp pks pky ppa ppb ppi ppk ppp pps ps- psa psb psi psk psp pss psy py- pya pyb pyk pys saa sab sai sak sap sas say sba sbb sbi sbk sbp sbs sby sia sib sii sik sip sis sk- ska skb ski skk skp sks sky spa spb spi spk spp sps spy ss- ssa ssb ssi ssk ssp sss sy- sya syb syi syk syp sys yaa yab yai yak yap yas yay ybi ybp ybs yby yii yip yis yka yki ykk ypa yps ysa ysb ysi ysk ysp yss ysy yyb yys yyy