a-a a-b a-i aaa aab aad aai aap aay ab- aba abb abd abi abp aby ad- ada adb add adi adp ady ai- aia aib aid aii aip aiy ap- apa apb apd api app apy ay- aya ayd ayi ayp b-p baa bab bad bai bap bay bba bbb bbd bbi bbp bby bda bdb bdd bdi bdp bdy bi- bia bib bid bii bip biy bpa bpb bpd bpi bpp bpy by- bya byd byi byp daa dab dad dai dap day dba dbb dbd dbi dbp dby dda ddb ddd ddi ddp ddy di- dia dib did dii dip diy dpa dpb dpd dpi dpp dy- dya dyb dyd dyp dyy i-d ia- iaa iab iad iai iap iba ibb ibd ibi ibp iby ida idb idd idi idp idy iia iib iid iii iip ipa ipb ipd ipi ipp ipy iya iyy p-p paa pab pad pai pap pay pba pbb pbd pbi pbp pby pda pdb pdd pdi pdp pia pib pid pii pip ppa ppb ppd ppi ppp py- pya pyb pyd yaa yab yad yai yap yay ybi ybp yby yda ydy yid yii yip ypa ypd yyb yyy