a-a a-b a-c a-t aaa aab aac aad aak aao aar aat aau aay ab- aba abb abc abd abk abo abr abt abu aby ac- aca acb acc acd ack aco acr act acu acy ad- ada adb adc add adk ado adr adt adu ady aka akb akc akd akk ako akr aku aoa aob aoc aod aok aoo aor aot aou ar- ara arb arc ard ark aro arr art aru ary at- ata atb atc atd ato atr att atu au- aua aub auc aud auk auo aur aut ay- aya ayc ayd ayk ayo ayr ayt ayu b-u baa bab bac bad bak bao bar bat bau bay bba bbb bbc bbd bbk bbo bbr bbt bbu bby bca bcb bcc bcd bck bco bcr bct bcu bcy bda bdb bdc bdd bdk bdo bdr bdt bdu bdy bka bkb bkc bkk bko bkr bkt boa bob boc bod bok boo bor bot bou boy bra brb brd brk bro brr brt bru bry bta btb btc btd btk bto btr btt btu bty bua bub buc bud buk buo bur but buu buy by- bya byc byd byk byo byr byt byu c-- caa cab cac cad cak cao car cat cau cay cba cbb cbc cbd cbk cbo cbr cbt cbu cby cca ccb ccc ccd cck cco ccr cct ccu cda cdb cdc cdd cdk cdo cdr cdt cdu cdy cka ckb ckc ckd cko ckt cky co- coa cob coc cod cok coo cor cot cou coy cra crb crc crd crk cro crr crt cru cry cta ctb ctc ctd ctk cto ctr ctt ctu cty cua cub cuc cud cuk cuo cur cut cuu cuy cya cyb cyc cyd cyk cyo cyr cyt daa dab dac dad dak dao dar dat dau day dba dbb dbc dbd dbk dbo dbr dbt dbu dby dca dcb dcc dcd dck dco dcr dct dcu dda ddb ddc ddd ddk ddo ddr ddt ddu ddy dka dkb dkc dkk dko dkr dkt dku doa dob doc dod dok doo dor dot dou doy dra drb drc drd drk dro drr drt dru dry dta dtb dtc dtd dtk dto dtr dtt dtu dty dua dub duc dud duk duo dur dut duy dy- dya dyb dyc dyd dyk dyo dyr dyu dyy k-t ka- kaa kab kac kad kak kao kar kat kau kay kba kbb kbc kbd kbk kbo kbr kbu kca kcb kcc kcd kck kcr kct kcu kda kdb kdc kdk kdo kdr kdt kdu kdy kkb kkc kkk kkr kkt kku kky koa kob koc kod kok koo kor kot kou koy kra krc krd krk kro krr krt kru kry kta ktb ktc ktk kto ktr ktt ktu kub kuc kud kuk kur kut kuu kuy kya kyc kyd kyo kyr kyt kyu oaa oab oac oad oak oao oar oat oau ob- oba obb obc obd obk obo obr obt obu oby oc- oca ocb occ ocd ock oco ocr oct ocu oda odb odc odd odo odr odt odu oka okb okc okd okk oko okr oku oo- ooa oob ooc ood ook ooo oor oot or- ora orb orc ord ork oro orr ort oru ory ot- ota otb otc otd otk oto otr ott otu ou- oua ouc oud ouk ouo our out oya oyd oyo ra- raa rab rac rad rak rao rar rat rau ray rba rbb rbc rbd rbk rbo rbr rbt rbu rca rcb rcc rcd rco rcr rct rcu rda rdb rdc rdd rdo rdr rdt rdu rdy rkb rkc rkk rko rkt rku rky roa rob roc rod rok roo ror rot rou roy rra rrb rrc rrd rrk rrr rrt rru rta rtb rtc rtd rtk rto rtr rtt rtu rty rua rub ruc rud ruk ruo rur rut ruu ruy ry- rya ryc ryd ryk ryo ryr ryu ryy taa tab tac tad tak tao tar tat tau tay tba tbb tbc tbd tbk tbo tbr tbt tbu tca tcb tcc tcd tck tco tcr tct tcu tda tdb tdc tdd tdk tdo tdr tdt tdu tdy tka tkb tkc tkk tko tkr tkt tky to- toa tob toc tod tok too tor tot tou toy tra trb trc trd trk tro trr trt tru try tta ttb ttc ttd ttk tto ttr ttt ttu tty tua tub tuc tud tuk tuo tur tut tuu tuy tya tyc tyd tyo tyr tyt ua- uaa uab uac uad uak uao uar uat uau uay uba ubb ubc ubk ubo ubr ubt ubu uby uca ucb ucc ucd uck uco ucr uct ucu uda udb udc udd udk udo udr udt udu uka ukb ukc ukk ukr uku uoa uob uoc uod uok uoo uor uot ur- ura urb urc urd urk uro urr urt uru ury uta utb utc utd utk uto utr utt utu uty uua uuc uur uut uuu uyc uyo uyu yaa yab yac yad yak yao yar yat yau yay ybc ybr yby yca ycc ycd yco ycu ycy yda ydo ydt ydy yka ykk yob yoc yod yok yoo yor yot you yoy yra yrc yro yrt yru yta ytc ytd ytk yto ytr ytt ytu yua yud yuk yuo yur yut yuu yuy yyb yyc yyt yyu yyy