a-a a-b a-c a-t aaa aab aac aad aak aao aas aat aau aay ab- aba abb abc abd abk abo abs abt abu aby ac- aca acb acc acd ack aco acs act acu acy ad- ada adb adc add adk ado ads adt adu ady aka akb akc akd akk ako aks aku aoa aob aoc aod aok aoo aos aot aou as- asa asb asc asd ask aso ass ast asu asy at- ata atb atc atd ato ats att atu au- aua aub auc aud auk auo aus aut ay- aya ayc ayd ayk ayo ays ayt ayu b-u baa bab bac bad bak bao bas bat bau bay bba bbb bbc bbd bbk bbo bbs bbt bbu bby bca bcb bcc bcd bck bco bcs bct bcu bcy bda bdb bdc bdd bdk bdo bds bdt bdu bdy bka bkb bkc bkk bko bks bkt boa bob boc bod bok boo bos bot bou boy bsa bsb bsc bsd bsk bso bss bst bsu bsy bta btb btc btd btk bto bts btt btu bty bua bub buc bud buk buo bus but buu buy by- bya byc byd byk byo bys byt byu c-- caa cab cac cad cak cao cas cat cau cay cba cbb cbc cbd cbk cbo cbs cbt cbu cby cca ccb ccc ccd cck cco ccs cct ccu cda cdb cdc cdd cdk cdo cds cdt cdu cdy cka ckb ckc ckd cko cks ckt cky co- coa cob coc cod cok coo cos cot cou coy csa csb csc csd csk cso css cst csu csy cta ctb ctc ctd ctk cto cts ctt ctu cty cua cub cuc cud cuk cuo cus cut cuu cuy cya cyb cyc cyd cyk cyo cys cyt daa dab dac dad dak dao das dat dau day dba dbb dbc dbd dbk dbo dbs dbt dbu dby dca dcb dcc dcd dck dco dcs dct dcu dda ddb ddc ddd ddk ddo dds ddt ddu ddy dka dkb dkc dkk dko dks dkt dku doa dob doc dod dok doo dos dot dou doy dsa dsb dsc dsd dsk dso dss dst dsu dsy dta dtb dtc dtd dtk dto dts dtt dtu dty dua dub duc dud duk duo dus dut duy dy- dya dyb dyc dyd dyk dyo dys dyu dyy k-t ka- kaa kab kac kad kak kao kas kat kau kay kba kbb kbc kbd kbk kbo kbs kbu kca kcb kcc kcd kck kcs kct kcu kda kdb kdc kdk kdo kds kdt kdu kdy kkb kkc kkk kks kkt kku kky koa kob koc kod kok koo kos kot kou koy ksa ksb ksc ksd ksk kso kss kst ksu kta ktb ktc ktk kto kts ktt ktu kub kuc kud kuk kus kut kuu kuy kya kyc kyd kyo kys kyt kyu oaa oab oac oad oak oao oas oat oau ob- oba obb obc obd obk obo obs obt obu oby oc- oca ocb occ ocd ock oco ocs oct ocu oda odb odc odd odo ods odt odu oka okb okc okd okk oko oks oku oo- ooa oob ooc ood ook ooo oos oot os- osa osb osc osd osk oso oss ost osu ot- ota otb otc otd otk oto ots ott otu ou- oua ouc oud ouk ouo ous out oya oyd oyo oys saa sab sac sad sak sao sas sat sau say sba sbb sbc sbd sbk sbo sbs sbt sbu sby sca scb scc scd sck sco scs sct scu sda sdb sdc sdd sdk sdo sds sdt sdu sdy sk- ska skb skc skd skk sko sks skt sku sky soa sob soc sod sok soo sos sot sou soy ss- ssa ssb ssc ssd ssk sso sss sst ssu sta stb stc std stk sto sts stt stu sty sua sub suc sud suk suo sus sut suu suy sy- sya syb syc syd syk sys syt syu taa tab tac tad tak tao tas tat tau tay tba tbb tbc tbd tbk tbo tbs tbt tbu tca tcb tcc tcd tck tco tcs tct tcu tda tdb tdc tdd tdk tdo tds tdt tdu tdy tka tkb tkc tkk tko tks tkt tky to- toa tob toc tod tok too tos tot tou toy tsa tsb tsc tsd tsk tso tss tst tsu tsy tta ttb ttc ttd ttk tto tts ttt ttu tty tua tub tuc tud tuk tuo tus tut tuu tuy tya tyc tyd tyo tys tyt ua- uaa uab uac uad uak uao uas uat uau uay uba ubb ubc ubk ubo ubs ubt ubu uby uca ucb ucc ucd uck uco ucs uct ucu uda udb udc udd udk udo uds udt udu uka ukb ukc ukk uku uoa uob uoc uod uok uoo uos uot usa usb usc usd usk uso uss ust usu uta utb utc utd utk uto uts utt utu uty uua uuc uus uut uuu uyc uyo uys uyu yaa yab yac yad yak yao yas yat yau yay ybc ybs yby yca ycc ycd yco ycs ycu ycy yda ydo yds ydt ydy yka ykk yob yoc yod yok yoo yos yot you yoy ysa ysb ysc ysk yso yss yst ysu ysy yta ytc ytd ytk yto yts ytt ytu yua yud yuk yuo yus yut yuu yuy yyb yyc yys yyt yyu yyy