a-a a-b a-c a-t aaa aab aac aaf aao aar aas aat aau aay ab- aba abb abc abf abo abr abs abt abu aby ac- aca acb acc acf aco acr acs act acu acy af- afa afb afc aff afo afr afs aft afu afy aoa aob aoc aof aoo aor aos aot aou ar- ara arb arc arf aro arr ars art aru ary as- asa asb asc asf aso asr ass ast asu asy at- ata atb atc atf ato atr ats att atu au- aua aub auc auf auo aur aus aut ay- aya ayc ayf ayo ayr ays ayt ayu b-u baa bab bac baf bao bar bas bat bau bay bba bbb bbc bbf bbo bbr bbs bbt bbu bby bca bcb bcc bcf bco bcr bcs bct bcu bcy bfa bfb bfc bff bfo bfr bfs bft bfu bfy boa bob boc bof boo bor bos bot bou boy bra brb brf bro brr brs brt bru bry bsa bsb bsc bsf bso bsr bss bst bsu bsy bta btb btc btf bto btr bts btt btu bty bua bub buc buf buo bur bus but buu buy by- bya byc byf byo byr bys byt byu c-- caa cab cac caf cao car cas cat cau cay cba cbb cbc cbf cbo cbr cbs cbt cbu cby cca ccb ccc ccf cco ccr ccs cct ccu cfa cfb cfc cff cfo cfr cfs cft cfu co- coa cob coc cof coo cor cos cot cou coy cra crb crc crf cro crr crs crt cru cry csa csb csc csf cso csr css cst csu csy cta ctb ctc ctf cto ctr cts ctt ctu cty cua cub cuc cuf cuo cur cus cut cuu cuy cya cyb cyc cyf cyo cyr cys cyt faa fab fac faf fao far fas fat fau fay fba fbb fbc fbf fbo fbr fbs fbt fbu fca fcb fcc fcf fco fcr fcs fct fcu fcy ffa ffc fff ffo ffr ffs fft ffu ffy foa fob foc fof foo for fos fot fou foy fra frb frc frf fro frr frs frt fru fry fsa fsb fsc fsf fso fsr fss fst fsu fta ftb ftc ftf fto ftr fts ftt ftu fty fua fub fuf fuo fur fus fut fuu fy- fya fyb fyc fyo oaa oab oac oaf oao oar oas oat oau ob- oba obb obc obf obo obr obs obt obu oby oc- oca ocb occ ocf oco ocr ocs oct ocu of- ofa ofb ofc off ofo ofr ofs oft ofu oo- ooa oob ooc oof ooo oor oos oot or- ora orb orc orf oro orr ors ort oru ory os- osa osb osc osf oso osr oss ost osu ot- ota otb otc otf oto otr ots ott otu ou- oua ouc ouf ouo our ous out oya oyo oys ra- raa rab rac raf rao rar ras rat rau ray rba rbb rbc rbf rbo rbr rbs rbt rbu rca rcb rcc rcf rco rcr rcs rct rcu rfa rfb rfc rff rfo rfr rfs rft rfu roa rob roc rof roo ror ros rot rou roy rra rrb rrc rrf rrr rrs rrt rru rsa rsb rsc rsf rso rsr rss rst rsu rta rtb rtc rtf rto rtr rts rtt rtu rty rua rub ruc ruf ruo rur rus rut ruu ruy ry- rya ryc ryf ryo ryr rys ryu ryy saa sab sac saf sao sar sas sat sau say sba sbb sbc sbf sbo sbr sbs sbt sbu sby sca scb scc scf sco scr scs sct scu sfa sfb sfc sff sfo sfr sfs sft sfu soa sob soc sof soo sor sos sot sou soy sr- sra srb src srf sro srr srs srt sry ss- ssa ssb ssc ssf sso ssr sss sst ssu sta stb stc stf sto str sts stt stu sty sua sub suc suf suo sur sus sut suu suy sy- sya syb syc syr sys syt syu taa tab tac taf tao tar tas tat tau tay tba tbb tbc tbf tbo tbr tbs tbt tbu tca tcb tcc tcf tco tcr tcs tct tcu tfa tfb tfc tff tfo tfr tfs tft tfu to- toa tob toc tof too tor tos tot tou toy tra trb trc trf tro trr trs trt tru try tsa tsb tsc tsf tso tsr tss tst tsu tsy tta ttb ttc ttf tto ttr tts ttt ttu tty tua tub tuc tuf tuo tur tus tut tuu tuy tya tyc tyf tyo tyr tys tyt ua- uaa uab uac uaf uao uar uas uat uau uay uba ubb ubc ubf ubo ubr ubs ubt ubu uby uca ucb ucc ucf uco ucr ucs uct ucu ufa ufc uff ufo ufr ufs uft ufu uoa uob uoc uoo uor uos uot ur- ura urb urc urf uro urr urs urt uru ury usa usb usc usf uso usr uss ust usu uta utb utc utf uto utr uts utt utu uty uua uuc uur uus uut uuu uyc uyo uys uyu yaa yab yac yaf yao yar yas yat yau yay ybc ybf ybr ybs yby yca ycc ycf yco ycs ycu ycy yfa yfc yff yfr yfs yft yfu yob yoc yof yoo yor yos yot you yoy yra yrc yrf yro yrs yrt yru ysa ysb ysc yso ysr yss yst ysu ysy yta ytc ytf yto ytr yts ytt ytu yua yuo yur yus yut yuu yuy yyb yyc yyf yys yyt yyu yyy