-er a-a a-b a-c a-q a-t aaa aab aac aae aak aaq aar aat aau ab- aba abb abc abe abk abq abr abt abu ac- aca acb acc ace ack acq acr act acu aea aeb aec aee aek aeq aer aet aeu aka akb akc ake akk akr aku aqa aqc aqr aqt ar- ara arb arc are ark arq arr art aru at- ata atb atc ate atr att atu au- aua aub auc aue auk aur aut b-u baa bab bac bae bak baq bar bat bau bba bbb bbc bbe bbk bbq bbr bbt bbu bca bcb bcc bce bck bcq bcr bct bcu be- bea beb bec bee bek beq ber bet beu bka bkb bkc bke bkk bkq bkr bkt bqc bqe bqt bra brb bre brk brq brr brt bru bta btb btc bte btk btq btr btt btu bua bub buc bue buk bur but buu c-- caa cab cac cae cak caq car cat cau cba cbb cbc cbe cbk cbq cbr cbt cbu cca ccb ccc cce cck ccr cct ccu ce- cea ceb cec cee cek ceq cer cet ceu cka ckb ckc ckt cqa cqb cqc cqt cra crb crc cre crk crq crr crt cru cta ctb ctc cte ctk ctq ctr ctt ctu cua cub cuc cue cuk cuq cur cut cuu eaa eab eac eae eak ear eat eau eba ebb ebc ebe ebk ebq ebr ebt ebu ec- eca ecb ecc ece eck ecq ecr ect ecu eea eeb eec eee eek eer eet eka ekb ekc eke ekr ekt eku eqa eqe eqq eqt equ era erb erc ere erk erq err ert eru eta etb etc ete etk etr ett etu eu- eua eub euc eue eur eut k-t ka- kaa kab kac kae kak kar kat kau kba kbb kbc kbe kbk kbr kbu kca kcb kcc kce kck kcr kct kcu ke- kea keb kec kee kek ker ket kkb kkc kke kkk kkr kkt kku kqa kra krc krk krr krt kru kta ktb ktc kte ktk ktr ktt ktu kub kuc kue kuk kur kut kuu qaa qac qar qat qau qba qbc qbe qbq qca qcc qct qec qee qet qqk qqq qqu qra qrb qrc qre qrt qru qta qtc qtq qtr qu- qua que qur qut ra- raa rab rac rae rak raq rar rat rau rba rbb rbc rbe rbk rbr rbt rbu rca rcb rcc rce rcr rct rcu re- rea reb rec ree rek req rer ret reu rkb rkc rke rkk rkt rku rqc rra rrb rrc rrk rrq rrr rrt rru rta rtb rtc rte rtk rtq rtr rtt rtu rua rub ruc rue ruk rur rut ruu taa tab tac tae tak taq tar tat tau tba tbb tbc tbe tbk tbr tbt tbu tca tcb tcc tce tck tcr tct tcu te- tea teb tec tee tek teq ter tet teu tka tkb tkc tke tkk tkr tkt tra trb trc tre trk trq trr trt tru tta ttb ttc tte ttk ttr ttt ttu tua tub tuc tue tuk tur tut tuu ua- uaa uab uac uae uak uaq uar uat uau uba ubb ubc ube ubk ubr ubt ubu uca ucb ucc uce uck ucr uct ucu uea ueb uec uee uer uet uka ukb ukc uke ukk ukr uku ur- ura urb urc ure urk urr urt uru uta utb utc ute utk utr utt utu uua uuc uue uur uut uuu