-ic a-a a-b a-c a-i a-t aaa aab aac aai aao aar aas aat aay ab- aba abb abc abi abo abr abs abt aby ac- aca acb acc aci aco acr acs act acy ai- aia aib aic aii aio air ais ait aiy aoa aob aoc aoi aoo aor aos aot ar- ara arb arc ari aro arr ars art ary as- asa asb asc asi aso asr ass ast asy at- ata atb atc ati ato atr ats att ay- aya ayc ayi ayo ayr ays ayt baa bab bac bai bao bar bas bat bay bba bbb bbc bbi bbo bbr bbs bbt bby bca bcb bcc bci bco bcr bcs bct bcy bi- bia bib bic bii bio bir bis bit biy boa bob boc boi boo bor bos bot boy bra brb bri bro brr brs brt bry bsa bsb bsc bsi bso bsr bss bst bsy bta btb btc bti bto btr bts btt bty by- bya byc byi byo byr bys byt c-- caa cab cac cai cao car cas cat cay cba cbb cbc cbi cbo cbr cbs cbt cby cca ccb ccc cci cco ccr ccs cct ci- cia cib cic cii cio cir cis cit co- coa cob coc coi coo cor cos cot coy cra crb crc cri cro crr crs crt cry csa csb csc csi cso csr css cst csy cta ctb ctc cti cto ctr cts ctt cty cya cyb cyc cyo cyr cys cyt ia- iaa iab iac iai iao iar ias iat iba ibb ibc ibi ibo ibr ibs ibt iby ica icb icc ici ico icr ics ict icy iia iib iic iii iio iir iis iit io- ioa iob ioc ioi ioo ior ios iot ir- ira irb irc iri iro irr irs irt iry is- isa isb isc isi iso isr iss ist isy ita itb itc iti ito its itt ity iya iyc iyo iyr iys iyt iyy o-i oaa oab oac oai oao oar oas oat ob- oba obb obc obi obo obr obs obt oby oc- oca ocb occ oci oco ocr ocs oct oia oib oic oii oio oir ois oit oo- ooa oob ooc ooi ooo oor oos oot or- ora orb orc ori oro orr ors ort ory os- osa osb osc osi oso osr oss ost ot- ota otb otc oti oto otr ots ott oya oyi oyo oys ra- raa rab rac rai rao rar ras rat ray rba rbb rbc rbi rbo rbr rbs rbt rca rcb rcc rci rco rcr rcs rct ria rib ric rii rio rir ris rit riy roa rob roc roi roo ror ros rot roy rra rrb rrc rri rrr rrs rrt rsa rsb rsc rsi rso rsr rss rst rta rtb rtc rti rto rtr rts rtt rty ry- rya ryc ryo ryr rys ryy saa sab sac sai sao sar sas sat say sba sbb sbc sbi sbo sbr sbs sbt sby sca scb scc sci sco scr scs sct sia sib sic sii sio sir sis sit soa sob soc soi soo sor sos sot soy sr- sra srb src sri sro srr srs srt sry ss- ssa ssb ssc ssi sso ssr sss sst sta stb stc sti sto str sts stt sty sy- sya syb syc syi syr sys syt taa tab tac tai tao tar tas tat tay tba tbb tbc tbi tbo tbr tbs tbt tca tcb tcc tci tco tcr tcs tct tia tib tic tii tio tir tis tit tiy to- toa tob toc toi too tor tos tot toy tra trb trc tri tro trr trs trt try tsa tsb tsc tsi tso tsr tss tst tsy tta ttb ttc tti tto ttr tts ttt tty tya tyc tyo tyr tys tyt yaa yab yac yai yao yar yas yat yay ybc ybi ybr ybs yby yca ycc yci yco ycs ycy yii yio yir yis yit yob yoc yoi yoo yor yos yot yoy yra yrc yro yrs yrt ysa ysb ysc ysi yso ysr yss yst ysy yta ytc yto ytr yts ytt yyb yyc yys yyt yyy