a-a a-b a-i a-t a-z aaa aab aai aao aar aat aay aaz ab- aba abb abi abo abr abt aby abz ai- aia aib aii aio air ait aiy aiz aoa aob aoi aoo aor aot ar- ara arb ari aro arr art ary arz at- ata atb ati ato atr att atz ay- aya ayi ayo ayr ayt ayz az- aza azb azi azo azt azy azz baa bab bai bao bar bat bay baz bba bbb bbi bbo bbr bbt bby bi- bia bib bii bio bir bit biy biz boa bob boi boo bor bot boy boz bra brb bri bro brr brt bry brz bta btb bti bto btr btt bty btz by- bya byi byo byr byt byz bza bzo bzr bzz ia- iaa iab iai iao iar iat iaz iba ibb ibi ibo ibr ibt iby ibz iia iib iii iio iir iit io- ioa iob ioi ioo ior iot ir- ira irb iri iro irr irt iry ita itb iti ito itt ity itz iya iyo iyr iyt iyy iza izi izo izy izz o-i oaa oab oai oao oar oat ob- oba obb obi obo obr obt oby oia oib oii oio oir oit oiz oo- ooa oob ooi ooo oor oot or- ora orb ori oro orr ort ory orz ot- ota otb oti oto otr ott otz oya oyi oyo oza ozo ozt ozz ra- raa rab rai rao rar rat ray raz rba rbb rbi rbo rbr rbt ria rib rii rio rir rit riy riz roa rob roi roo ror rot roy roz rra rrb rri rrr rrt rta rtb rti rto rtr rtt rty rtz ry- rya ryo ryr ryy ryz rza rzb rzo rzy taa tab tai tao tar tat tay taz tba tbb tbi tbo tbr tbt tbz tia tib tii tio tir tit tiy tiz to- toa tob toi too tor tot toy toz tra trb tri tro trr trt try trz tta ttb tti tto ttr ttt tty tya tyo tyr tyt tza yaa yab yai yao yar yat yay yaz ybi ybr yby ybz yii yio yir yit yiz yob yoi yoo yor yot yoy yra yro yrt yta yto ytr ytt yyb yyt yyy yyz yzb yzr yzy zaa zab zai zao zar zat zay zaz zbb zbr zbt zby zia zib zio zir zit ziz zo- zoa zob zoi zoo zor zot zro zta ztr zzr zzt zzy zzz