a-a a-b a-c a-t aaa aab aac aae aak aao aap aat ab- aba abb abc abe abk abo abp abt ac- aca acb acc ace ack aco acp act aea aeb aec aee aek aeo aep aet aka akb akc ake akk ako akp aoa aob aoc aoe aok aoo aop aot ap- apa apb apc ape apk apo app apt at- ata atb atc ate ato atp att b-p baa bab bac bae bak bao bap bat bba bbb bbc bbe bbk bbo bbp bbt bca bcb bcc bce bck bco bcp bct be- bea beb bec bee bek beo bep bet bka bkb bkc bke bkk bko bkp bkt boa bob boc boe bok boo bop bot bpa bpb bpc bpe bpo bpp bpt bta btb btc bte btk bto btp btt c-- caa cab cac cae cak cao cap cat cba cbb cbc cbe cbk cbo cbp cbt cca ccb ccc cce cck cco ccp cct ce- cea ceb cec cee cek ceo cep cet cka ckb ckc cko ckt co- coa cob coc coe cok coo cop cot cpa cpb cpc cpe cpk cpo cpp cpt cta ctb ctc cte ctk cto ctp ctt eaa eab eac eae eak eao eap eat eba ebb ebc ebe ebk ebo ebp ebt ec- eca ecb ecc ece eck eco ect eea eeb eec eee eek eeo eep eet eka ekb ekc eke eko ekp ekt eo- eoa eob eoc eoe eok eoo eop eot ep- epa epb epc epe epo epp ept eta etb etc ete etk eto etp ett k-t ka- kaa kab kac kae kak kao kap kat kba kbb kbc kbe kbk kbo kbp kca kcb kcc kce kck kcp kct ke- kea keb kec kee kek keo kep ket kkb kkc kke kkk kkp kkt koa kob koc koe kok koo kop kot kpa kpc kpe kpk kpo kpp kpt kta ktb ktc kte ktk kto ktp ktt oaa oab oac oae oak oao oap oat ob- oba obb obc obe obk obo obp obt oc- oca ocb occ ock oco ocp oct oea oeb oec oee oeo oep oet oka okb okc oke okk oko okp oo- ooa oob ooc ook ooo oop oot op- opa opb opc ope opk opo opp opt ot- ota otb otc ote otk oto otp ott p-p paa pab pac pae pak pao pap pat pba pbb pbc pbe pbk pbo pbp pbt pca pcb pcc pce pck pco pcp pct pea peb pec pee pek peo pep pet pka pkb pkc pke pko pkp pkt poa pob poc poe pok poo pop pot ppa ppb ppc ppe ppk ppo ppp ppt pt- pta ptb ptc pte ptk pto ptp ptt taa tab tac tae tak tao tap tat tba tbb tbc tbe tbk tbo tbp tbt tca tcb tcc tce tck tco tcp tct te- tea teb tec tee tek teo tep tet tka tkb tkc tke tkk tko tkp tkt to- toa tob toc toe tok too top tot tpa tpb tpc tpe tpk tpo tpp tpt tta ttb ttc tte ttk tto ttp ttt

a-ak a-be a-ok aaaa aaab aaac aaae aaap aaba aabb aabc aabp aabt aaca aacb aacc aace aack aaco aacp aact aaea aaec aaep aaka aake aaoe aaoo aapa aapc aapo aapt aata aatc aatk aatt abaa abab abac abae abak abap abat abb- abba abbb abbe abbo abbt abca abcb abcc abcp abct abec abee abet aboa abob abok aboo abot abpa abpc abpp abta ac-t acaa acab acac acae acap acat acba acca accc acce acco accp acct ace- acea acec acek acet acke acoa acoe acop acot acpa acpe acpt acta actc acte acto actt aeac aeap aecb aect aeka aeta aetc aeto aett akaa akae akao akap akca akee akka akko akok akot akpo akte aoba aoca aoce aokp aopo aotc apac apak apao apap apat apba apca apcb apcc apco apea apec apep apet apke apo- apoc apoe apoo apop apot appa appc appt apta aptc apte aptt at-t ataa atab atac atae atak atap atat atca atcc atck atco atea atec atee ateo atep atka atkt atob atoc atoe atok atop atot atta atte atto attp baaa baak baat baba babb babe babo bac- baca bacc bace back baco bact baek bak- baka bake bako bakt bapa bapc bape bapp bapt bata batc bate bato batt bbbb bbeb bbet bcaa bcap bcat bcbc bcbp bcca bccc bcec bcet bcpp bctc beak beap beat beba bebb bebe bebo beca beck beeb beek beep beet beka beke beko beo- beok beot bepo beta betc bete beto bett bkpt boab boac boak boat boba bobb bobe bobo boca boce bock boco boea boec boee boeo boep boet boka boke boko boob booc booe book boop boot bopa bope bopp bota botb bote boto bott bpcp bpea bpoe bpot btaa btbp btcc btec btek btob bttb c-bo caaa caab caac caap caat caba cabe cabo cac- caca cacc cace cack caco caec caka cake capa capb capc cape capo capp capt cat- cata catb catc cate cato catt cbac cbat cbbc cbca cbcc cbce cbcp cbct cbea cbec cbee cbet cbka cbko cbot cbpc cbpp cbta cbtc ccaa ccab ccac ccap ccat ccba ccbc ccca cccb cccc cccp ccee ccob ccoc ccpa ccpe ccpp cctb cctc cctt ceac ceat ceba cebp cec- ceca cece ceco cecp cect ceeb ceec ceke ceop cepa cepc cepe cepo cepp cept cet- ceta cete ceto cetp ckac ckat ckbc ckbe ckck ckco ckoa ckob ckoc ckoo ckot ckpc cktb coak coat coba cobb cobe cobo coca coce cock coco cocp coct coep cok- coka coke coko coob cook coop coot copa cope copo copp copt cota cotb cotc cote coto cott cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cppa cptp ctab ctae ctba ctca ctcp ctec ctep ctot ctpo ctpp ctta eaba eaca eacc eaec eaop eapc eapp eata eate ebac ebba ebbc ebbo ebcc eboe eboo ebpo ecaa