-ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aao aar aat aay ab- aba abb abc abf abi abo abr abt aby ac- aca acb acc acf aci aco acr act acy af- afa afb afc aff afi afo afr aft afy ai- aia aib aic aif aii aio air ait aiy aoa aob aoc aof aoi aoo aor aot ar- ara arb arc arf ari aro arr art ary at- ata atb atc atf ati ato atr att ay- aya ayc ayf ayi ayo ayr ayt baa bab bac baf bai bao bar bat bay bba bbb bbc bbf bbi bbo bbr bbt bby bca bcb bcc bcf bci bco bcr bct bcy bfa bfb bfc bff bfi bfo bfr bft bfy bi- bia bib bic bif bii bio bir bit biy boa bob boc bof boi boo bor bot boy bra brb brf bri bro brr brt bry bta btb btc btf bti bto btr btt bty by- bya byc byf byi byo byr byt c-- caa cab cac caf cai cao car cat cay cba cbb cbc cbf cbi cbo cbr cbt cby cca ccb ccc ccf cci cco ccr cct cfa cfb cfc cff cfi cfo cfr cft ci- cia cib cic cif cii cio cir cit co- coa cob coc cof coi coo cor cot coy cra crb crc crf cri cro crr crt cry cta ctb ctc ctf cti cto ctr ctt cty cya cyb cyc cyf cyo cyr cyt faa fab fac faf fai fao far fat fay fba fbb fbc fbf fbi fbo fbr fbt fca fcb fcc fcf fci fco fcr fct fcy ffa ffc fff ffi ffo ffr fft ffy fia fib fic fif fii fir fit foa fob foc fof foi foo for fot foy fra frb frc frf fri fro frr frt fry fta ftb ftc ftf fti fto ftr ftt fty fy- fya fyb fyc fyi fyo i-f ia- iaa iab iac iaf iai iao iar iat iba ibb ibc ibf ibi ibo ibr ibt iby ica icb icc icf ici ico icr ict icy ifa ifb ifc iff ifi ifo ifr ift ify iia iib iic iif iii iio iir iit io- ioa iob ioc iof ioi ioo ior iot ir- ira irb irc irf iri iro irr irt iry ita itb itc itf iti ito itt ity iya iyc iyo iyr iyt iyy o-i oaa oab oac oaf oai oao oar oat ob- oba obb obc obf obi obo obr obt oby oc- oca ocb occ ocf oci oco ocr oct of- ofa ofb ofc off ofi ofo ofr oft oia oib oic oif oii oio oir oit oo- ooa oob ooc oof ooi ooo oor oot or- ora orb orc orf ori oro orr ort ory ot- ota otb otc otf oti oto otr ott oya oyi oyo ra- raa rab rac raf rai rao rar rat ray rba rbb rbc rbf rbi rbo rbr rbt rca rcb rcc rcf rci rco rcr rct rfa rfb rfc rff rfi rfo rfr rft ria rib ric rif rii rio rir rit riy roa rob roc rof roi roo ror rot roy rra rrb rrc rrf rri rrr rrt rta rtb rtc rtf rti rto rtr rtt rty ry- rya ryc ryf ryo ryr ryy taa tab tac taf tai tao tar tat tay tba tbb tbc tbf tbi tbo tbr tbt tca tcb tcc tcf tci tco tcr tct tfa tfb tfc tff tfi tfo tfr tft tia tib tic tif tii tio tir tit tiy to- toa tob toc tof toi too tor tot toy tra trb trc trf tri tro trr trt try tta ttb ttc ttf tti tto ttr ttt tty tya tyc tyf tyo tyr tyt yaa yab yac yaf yai yao yar yat yay ybc ybf ybi ybr yby yca ycc ycf yci yco ycy yfa yfc yff yfr yft yif yii yio yir yit yob yoc yof yoi yoo yor yot yoy yra yrc yrf yro yrt yta ytc ytf yto ytr ytt yyb yyc yyf yyt yyy