a-a a-b a-c a-t aaa aab aac aae aaj aak aao aas aat ab- aba abb abc abe abj abk abo abs abt ac- aca acb acc ace acj ack aco acs act aea aeb aec aee aej aek aeo aes aet aja ajb ajc aje ajj ajk ajo ajs ajt aka akb akc ake akj akk ako aks aoa aob aoc aoe aoj aok aoo aos aot as- asa asb asc ase asj ask aso ass ast at- ata atb atc ate ato ats att baa bab bac bae baj bak bao bas bat bba bbb bbc bbe bbk bbo bbs bbt bca bcb bcc bce bcj bck bco bcs bct be- bea beb bec bee bek beo bes bet bja bjc bjj bjk bjs bjt bka bkb bkc bke bkk bko bks bkt boa bob boc boe boj bok boo bos bot bsa bsb bsc bse bsj bsk bso bss bst bta btb btc bte btk bto bts btt c-- c-j caa cab cac cae caj cak cao cas cat cba cbb cbc cbe cbj cbk cbo cbs cbt cca ccb ccc cce ccj cck cco ccs cct ce- cea ceb cec cee cej cek ceo ces cet cja cjb cjc cjk cjs cka ckb ckc cko cks ckt co- coa cob coc coe coj cok coo cos cot csa csb csc cse csj csk cso css cst cta ctb ctc cte ctk cto cts ctt eaa eab eac eae eaj eak eao eas eat eba ebb ebc ebe ebj ebk ebo ebs ebt ec- eca ecb ecc ece ecj eck eco ecs ect eea eeb eec eee eek eeo ees eet eja ejc ejo ejt eka ekb ekc eke eko eks ekt eo- eoa eob eoc eoe eok eoo eos eot es- esa esb esc ese esk eso ess est eta etb etc ete etj etk eto ets ett jaa jab jac jae jaj jak jao jas jat jba jbc jbj jbk jbo jbs jbt jca jcb jcc jce jck jco jcs jct jea jeb jec jee jej jek jeo jes jet jja jjb jjc jjj jjk jjs jka jkb jkk jko jks jkt joa job joc joe joj jok joo jos jot jsa jsb jsc jse jsj jsk jso jss jst jta jtb jtc jte jtk jts jtt k-t ka- kaa kab kac kae kaj kak kao kas kat kba kbb kbc kbe kbk kbo kbs kca kcb kcc kce kck kcs kct ke- kea keb kec kee kek keo kes ket kjb kjc kje kjs kkb kkc kke kkk kks kkt koa kob koc koe kok koo kos kot ksa ksb ksc kse ksk kso kss kst kta ktb ktc kte ktj ktk kto kts ktt oaa oab oac oae oaj oak oao oas oat ob- oba obb obc obe obj obk obo obs obt oc- oca ocb occ ocj ock oco ocs oct oea oeb oec oee oeo oes oet oja ojb ojc oje ojo ojs oka okb okc oke okj okk oko oks oo- ooa oob ooc ook ooo oos oot os- osa osb osc ose osj osk oso oss ost ot- ota otb otc ote otk oto ots ott saa sab sac sae saj sak sao sas sat sba sbb sbc sbe sbj sbk sbo sbs sbt sca scb scc sce scj sck sco scs sct se- sea seb sec see sej sek seo ses set sja sjb sjc sje sjj sjk sjs sjt sk- ska skb skc ske skj skk sko sks skt soa sob soc soe soj sok soo sos sot ss- ssa ssb ssc sse ssj ssk sso sss sst sta stb stc ste stj stk sto sts stt taa tab tac tae taj tak tao tas tat tba tbb tbc tbe tbj tbk tbo tbs tbt tca tcb tcc tce tcj tck tco tcs tct te- tea teb tec tee tej tek teo tes tet tjc tje tjo tjs tka tkb tkc tke tkk tko tks tkt to- toa tob toc toe toj tok too tos tot tsa tsb tsc tse tsj tsk tso tss tst tta ttb ttc tte ttk tto tts ttt