-ic a-a a-b a-c a-i a-t a-z aaa aab aac aai aao aar aat aaz ab- aba abb abc abi abo abr abt abz ac- aca acb acc aci aco acr act acz ai- aia aib aic aii aio air ait aiz aoa aob aoc aoi aoo aor aot ar- ara arb arc ari aro arr art arz at- ata atb atc ati ato atr att atz az- aza azb azi azo azt azz baa bab bac bai bao bar bat baz bba bbb bbc bbi bbo bbr bbt bca bcb bcc bci bco bcr bct bcz bi- bia bib bic bii bio bir bit biz boa bob boc boi boo bor bot boz bra brb bri bro brr brt brz bta btb btc bti bto btr btt btz bza bzo bzr bzz c-- caa cab cac cai cao car cat caz cba cbb cbc cbi cbo cbr cbt cbz cca ccb ccc cci cco ccr cct ccz ci- cia cib cic cii cio cir cit co- coa cob coc coi coo cor cot coz cra crb crc cri cro crr crt crz cta ctb ctc cti cto ctr ctt ctz cz- czc czo czt ia- iaa iab iac iai iao iar iat iaz iba ibb ibc ibi ibo ibr ibt ibz ica icb icc ici ico icr ict icz iia iib iic iii iio iir iit io- ioa iob ioc ioi ioo ior iot ir- ira irb irc iri iro irr irt ita itb itc iti ito itt itz iza izi izo izz o-i oaa oab oac oai oao oar oat ob- oba obb obc obi obo obr obt oc- oca ocb occ oci oco ocr oct ocz oia oib oic oii oio oir oit oiz oo- ooa oob ooc ooi ooo oor oot or- ora orb orc ori oro orr ort orz ot- ota otb otc oti oto otr ott otz oza ozo ozt ozz ra- raa rab rac rai rao rar rat raz rba rbb rbc rbi rbo rbr rbt rca rcb rcc rci rco rcr rct ria rib ric rii rio rir rit riz roa rob roc roi roo ror rot roz rra rrb rrc rri rrr rrt rta rtb rtc rti rto rtr rtt rtz rza rzb rzo taa tab tac tai tao tar tat taz tba tbb tbc tbi tbo tbr tbt tbz tca tcb tcc tci tco tcr tct tia tib tic tii tio tir tit tiz to- toa tob toc toi too tor tot toz tra trb trc tri tro trr trt trz tta ttb ttc tti tto ttr ttt tza zaa zab zac zai zao zar zat zaz zbb zbc zbr zbt zco zia zib zio zir zit ziz zo- zoa zob zoc zoi zoo zor zot zro zta ztr zzr zzt zzz