a-a a-b a-i aaa aab aad aai aar aay ab- aba abb abd abi abr aby ad- ada adb add adi adr ady ai- aia aib aid aii air aiy ar- ara arb ard ari arr ary ay- aya ayd ayi ayr baa bab bad bai bar bay bba bbb bbd bbi bbr bby bda bdb bdd bdi bdr bdy bi- bia bib bid bii bir biy bra brb brd bri brr bry by- bya byd byi byr daa dab dad dai dar day dba dbb dbd dbi dbr dby dda ddb ddd ddi ddr ddy di- dia dib did dii dir diy dra drb drd dri drr dry dy- dya dyb dyd dyr dyy i-d ia- iaa iab iad iai iar iba ibb ibd ibi ibr iby ida idb idd idi idr idy iia iib iid iii iir ir- ira irb ird iri irr iry iya iyr iyy ra- raa rab rad rai rar ray rba rbb rbd rbi rbr rda rdb rdd rdi rdr rdy ria rib rid rii rir riy rra rrb rrd rri rrr ry- rya ryd ryr ryy yaa yab yad yai yar yay ybi ybr yby yda ydy yid yii yir yra yyb yyy