a-a a-b a-i a-t aaa aab aad aai aar aat aay ab- aba abb abd abi abr abt aby ad- ada adb add adi adr adt ady ai- aia aib aid aii air ait aiy ar- ara arb ard ari arr art ary at- ata atb atd ati atr att ay- aya ayd ayi ayr ayt baa bab bad bai bar bat bay bba bbb bbd bbi bbr bbt bby bda bdb bdd bdi bdr bdt bdy bi- bia bib bid bii bir bit biy bra brb brd bri brr brt bry bta btb btd bti btr btt bty by- bya byd byi byr byt daa dab dad dai dar dat day dba dbb dbd dbi dbr dbt dby dda ddb ddd ddi ddr ddt ddy di- dia dib did dii dir dit diy dra drb drd dri drr drt dry dta dtb dtd dti dtr dtt dty dy- dya dyb dyd dyr dyy i-d ia- iaa iab iad iai iar iat iba ibb ibd ibi ibr ibt iby ida idb idd idi idr idt idy iia iib iid iii iir iit ir- ira irb ird iri irr irt iry ita itb itd iti itt ity iya iyr iyt iyy ra- raa rab rad rai rar rat ray rba rbb rbd rbi rbr rbt rda rdb rdd rdi rdr rdt rdy ria rib rid rii rir rit riy rra rrb rrd rri rrr rrt rta rtb rtd rti rtr rtt rty ry- rya ryd ryr ryy taa tab tad tai tar tat tay tba tbb tbd tbi tbr tbt tda tdb tdd tdi tdr tdt tdy tia tib tid tii tir tit tiy tra trb trd tri trr trt try tta ttb ttd tti ttr ttt tty tya tyd tyr tyt yaa yab yad yai yar yat yay ybi ybr yby yda ydt ydy yid yii yir yit yra yrt yta ytd ytr ytt yyb yyt yyy