a-a a-b a-i a-t a-z aaa aab aai aak aar aat aaz ab- aba abb abi abk abr abt abz ai- aia aib aii aik air ait aiz aka akb aki akk akr ar- ara arb ari ark arr art arz at- ata atb ati atr att atz az- aza azb azi azt azz baa bab bai bak bar bat baz bba bbb bbi bbk bbr bbt bi- bia bib bii bik bir bit biz bka bkb bkk bkr bkt bra brb bri brk brr brt brz bta btb bti btk btr btt btz bza bzr bzz ia- iaa iab iai iar iat iaz iba ibb ibi ibk ibr ibt ibz iia iib iii iir iit ika ikb iki ikk ikr ikt ir- ira irb iri irk irr irt ita itb iti itk itt itz iza izi izz k-t k-z ka- kaa kab kai kak kar kat kaz kba kbb kbi kbk kbr kbz kia kib kii kik kir kit kiz kkb kki kkk kkr kkt kra kri krk krr krt kta ktb ktk ktr ktt ra- raa rab rai rak rar rat raz rba rbb rbi rbk rbr rbt ria rib rii rik rir rit riz rkb rkk rkt rkz rra rrb rri rrk rrr rrt rta rtb rti rtk rtr rtt rtz rza rzb taa tab tai tak tar tat taz tba tbb tbi tbk tbr tbt tbz tia tib tii tik tir tit tiz tka tkb tkk tkr tkt tkz tra trb tri trk trr trt trz tta ttb tti ttk ttr ttt tza zaa zab zai zak zar zat zaz zbb zbr zbt zia zib zik zir zit ziz zka zta ztr zzr zzt zzz