-ic a-a a-b a-c a-i aaa aab aac aai aao aar aas aau aay ab- aba abb abc abi abo abr abs abu aby ac- aca acb acc aci aco acr acs acu acy ai- aia aib aic aii aio air ais aiu aiy aoa aob aoc aoi aoo aor aos aou ar- ara arb arc ari aro arr ars aru ary as- asa asb asc asi aso asr ass asu asy au- aua aub auc aui auo aur aus ay- aya ayc ayi ayo ayr ays ayu b-u baa bab bac bai bao bar bas bau bay bba bbb bbc bbi bbo bbr bbs bbu bby bca bcb bcc bci bco bcr bcs bcu bcy bi- bia bib bic bii bio bir bis biu biy boa bob boc boi boo bor bos bou boy bra brb bri bro brr brs bru bry bsa bsb bsc bsi bso bsr bss bsu bsy bua bub buc bui buo bur bus buu buy by- bya byc byi byo byr bys byu c-- caa cab cac cai cao car cas cau cay cba cbb cbc cbi cbo cbr cbs cbu cby cca ccb ccc cci cco ccr ccs ccu ci- cia cib cic cii cio cir cis ciu co- coa cob coc coi coo cor cos cou coy cra crb crc cri cro crr crs cru cry csa csb csc csi cso csr css csu csy cua cub cuc cui cuo cur cus cuu cuy cya cyb cyc cyo cyr cys ia- iaa iab iac iai iao iar ias iau iba ibb ibc ibi ibo ibr ibs ibu iby ica icb icc ici ico icr ics icu icy iia iib iic iii iio iir iis iiu io- ioa iob ioc ioi ioo ior ios iou ir- ira irb irc iri iro irr irs iru iry is- isa isb isc isi iso isr iss isu isy iu- iua iub iuc iui iur ius iya iyc iyo iyr iys iyy o-i oaa oab oac oai oao oar oas oau ob- oba obb obc obi obo obr obs obu oby oc- oca ocb occ oci oco ocr ocs ocu oia oib oic oii oio oir ois oiu oo- ooa oob ooc ooi ooo oor oos or- ora orb orc ori oro orr ors oru ory os- osa osb osc osi oso osr oss osu ou- oua ouc oui ouo our ous oya oyi oyo oys ra- raa rab rac rai rao rar ras rau ray rba rbb rbc rbi rbo rbr rbs rbu rca rcb rcc rci rco rcr rcs rcu ria rib ric rii rio rir ris riy roa rob roc roi roo ror ros rou roy rra rrb rrc rri rrr rrs rru rsa rsb rsc rsi rso rsr rss rsu rua rub ruc rui ruo rur rus ruu ruy ry- rya ryc ryo ryr rys ryu ryy saa sab sac sai sao sar sas sau say sba sbb sbc sbi sbo sbr sbs sbu sby sca scb scc sci sco scr scs scu sia sib sic sii sio sir sis siu soa sob soc soi soo sor sos sou soy sr- sra srb src sri sro srr srs sry ss- ssa ssb ssc ssi sso ssr sss ssu sua sub suc sui suo sur sus suu suy sy- sya syb syc syi syr sys syu ua- uaa uab uac uai uao uar uas uau uay uba ubb ubc ubi ubo ubr ubs ubu uby uca ucb ucc uci uco ucr ucs ucu uia uib uic uii uio uir uis uiu uoa uob uoc uoo uor uos ur- ura urb urc uri uro urr urs uru ury usa usb usc usi uso usr uss usu uua uuc uur uus uuu uyc uyi uyo uys uyu yaa yab yac yai yao yar yas yau yay ybc ybi ybr ybs yby yca ycc yci yco ycs ycu ycy yii yio yir yis yob yoc yoi yoo yor yos you yoy yra yrc yro yrs yru ysa ysb ysc ysi yso ysr yss ysu ysy yua yui yuo yur yus yuu yuy yyb yyc yys yyu yyy