a-a a-b a-c a-q a-t aaa aab aac aae aak aaq aas aat aau ab- aba abb abc abe abk abq abs abt abu ac- aca acb acc ace ack acq acs act acu aea aeb aec aee aek aeq aes aet aeu aka akb akc ake akk aks aku aqa aqc aqs aqt as- asa asb asc ase ask asq ass ast asu at- ata atb atc ate ats att atu au- aua aub auc aue auk aus aut b-u baa bab bac bae bak baq bas bat bau bba bbb bbc bbe bbk bbq bbs bbt bbu bca bcb bcc bce bck bcq bcs bct bcu be- bea beb bec bee bek beq bes bet beu bka bkb bkc bke bkk bkq bks bkt bqc bqe bqt bsa bsb bsc bse bsk bss bst bsu bta btb btc bte btk btq bts btt btu bua bub buc bue buk bus but buu c-- caa cab cac cae cak caq cas cat cau cba cbb cbc cbe cbk cbq cbs cbt cbu cca ccb ccc cce cck ccs cct ccu ce- cea ceb cec cee cek ceq ces cet ceu cka ckb ckc cks ckt cqa cqb cqc cqs cqt csa csb csc cse csk csq css cst csu cta ctb ctc cte ctk ctq cts ctt ctu cua cub cuc cue cuk cuq cus cut cuu eaa eab eac eae eak eas eat eau eba ebb ebc ebe ebk ebq ebs ebt ebu ec- eca ecb ecc ece eck ecq ecs ect ecu eea eeb eec eee eek ees eet eka ekb ekc eke eks ekt eku eqa eqe eqq eqs eqt equ es- esa esb esc ese esk esq ess est esu eta etb etc ete etk ets ett etu eu- eua eub euc eue eus eut k-t ka- kaa kab kac kae kak kas kat kau kba kbb kbc kbe kbk kbs kbu kca kcb kcc kce kck kcs kct kcu ke- kea keb kec kee kek kes ket kkb kkc kke kkk kks kkt kku kqa ksa ksb ksc kse ksk kss kst ksu kta ktb ktc kte ktk kts ktt ktu kub kuc kue kuk kus kut kuu qaa qac qas qat qau qba qbc qbe qbq qbs qca qcc qcs qct qec qee qet qqk qqq qqu qsa qsc qst qta qtc qtq qts qu- qua que qus qut saa sab sac sae sak saq sas sat sau sba sbb sbc sbe sbk sbq sbs sbt sbu sca scb scc sce sck scs sct scu se- sea seb sec see sek seq ses set seu sk- ska skb skc ske skk skq sks skt sku sqa sqq sqs ss- ssa ssb ssc sse ssk ssq sss sst ssu sta stb stc ste stk stq sts stt stu sua sub suc sue suk suq sus sut suu taa tab tac tae tak taq tas tat tau tba tbb tbc tbe tbk tbs tbt tbu tca tcb tcc tce tck tcs tct tcu te- tea teb tec tee tek teq tes tet teu tka tkb tkc tke tkk tks tkt tsa tsb tsc tse tsk tsq tss tst tsu tta ttb ttc tte ttk tts ttt ttu tua tub tuc tue tuk tus tut tuu ua- uaa uab uac uae uak uaq uas uat uau uba ubb ubc ube ubk ubs ubt ubu uca ucb ucc uce uck ucs uct ucu uea ueb uec uee ues uet uka ukb ukc uke ukk uku usa usb usc use usk uss ust usu uta utb utc ute utk uts utt utu uua uuc uue uus uut uuu