a-a a-b a-c a-t aaa aab aac aae aaf aak aao aat ab- aba abb abc abe abf abk abo abt ac- aca acb acc ace acf ack aco act aea aeb aec aee aef aek aeo aet af- afa afb afc afe aff afk afo aft aka akb akc ake akk ako aoa aob aoc aoe aof aok aoo aot at- ata atb atc ate atf ato att baa bab bac bae baf bak bao bat bba bbb bbc bbe bbf bbk bbo bbt bca bcb bcc bce bcf bck bco bct be- bea beb bec bee bef bek beo bet bfa bfb bfc bfe bff bfo bft bka bkb bkc bke bkf bkk bko bkt boa bob boc boe bof bok boo bot bta btb btc bte btf btk bto btt c-- caa cab cac cae caf cak cao cat cba cbb cbc cbe cbf cbk cbo cbt cca ccb ccc cce ccf cck cco cct ce- cea ceb cec cee cef cek ceo cet cfa cfb cfc cfe cff cfk cfo cft cka ckb ckc cko ckt co- coa cob coc coe cof cok coo cot cta ctb ctc cte ctf ctk cto ctt eaa eab eac eae eaf eak eao eat eba ebb ebc ebe ebf ebk ebo ebt ec- eca ecb ecc ece ecf eck eco ect eea eeb eec eee eef eek eeo eet ef- efa efb efc efe eff efo eft eka ekb ekc eke ekf eko ekt eo- eoa eob eoc eoe eof eok eoo eot eta etb etc ete etf etk eto ett faa fab fac fae faf fak fao fat fba fbb fbc fbe fbf fbk fbo fbt fca fcb fcc fce fcf fck fco fct fea feb fec fee fef fek feo fet ffa ffc ffe fff ffk ffo fft fka fkb fkc fkf fkk fkt foa fob foc foe fof fok foo fot fta ftb ftc fte ftf ftk fto ftt k-t ka- kaa kab kac kae kaf kak kao kat kba kbb kbc kbe kbf kbk kbo kca kcb kcc kce kck kct ke- kea keb kec kee kef kek keo ket kfa kfc kff kfo kkb kkc kke kkk kkt koa kob koc koe kof kok koo kot kta ktb ktc kte ktf ktk kto ktt oaa oab oac oae oaf oak oao oat ob- oba obb obc obe obf obk obo obt oc- oca ocb occ ocf ock oco oct oea oeb oec oee oef oeo oet of- ofa ofb ofc ofe off ofo oft oka okb okc oke okk oko oo- ooa oob ooc oof ook ooo oot ot- ota otb otc ote otf otk oto ott taa tab tac tae taf tak tao tat tba tbb tbc tbe tbf tbk tbo tbt tca tcb tcc tce tcf tck tco tct te- tea teb tec tee tef tek teo tet tfa tfb tfc tfe tff tfk tfo tft tka tkb tkc tke tkk tko tkt to- toa tob toc toe tof tok too tot tta ttb ttc tte ttf ttk tto ttt

a-ak a-be a-ok aaaa aaab aaac aaae aaaf aaba aabb aabc aabt aaca aacb aacc aace aacf aack aaco aact aaea aaec aafa aafb aafc aaff aaka aake aaoe aaoo aata aatc aatf aatk aatt abaa abab abac abae abaf abak abat abb- abba abbb abbe abbo abbt abca abcb abcc abcf abct abec abee abet abff aboa abob abof abok aboo abot abta ac-t acaa acab acac acae acat acba acca accc acce accf acco acct ace- acea acec acek acet acfc acfe acft acke acoa acoe acot acta actc acte actf acto actt aeac aeaf aecb aect aeka aeta aetc aetf aeto aett afaa afak afao afat afca afcb afcc afee afek afet affa affc affo afft afka afoa afoe afoo afta aftc afte akaa akae akao akca akee akka akko akok akot akte aoba aoca aoce aotc aotf at-t ataa atab atac atae atak atat atca atcc atcf atck atco atea atec atee atef ateo atfb atfc atfe atka atkt atob atoc atoe atof atok atot atta atte atto baaa baaf baak baat baba babb babe babo bac- baca bacc bace back baco bact baek bafc baff bafo baft bak- baka bake bako bakt bata batc bate batf bato batt bbbb bbeb bbet bbfc bcaa bcat bcbc bcca bccc bcec bcet bcfc bcof bctc beaf beak beat beba bebb bebe bebo beca beck beeb beef beek beet befa befe beff befo beft beka beke beko beo- beof beok beot beta betc bete beto bett bfca bfta bftt boab boac boak boat boba bobb bobe bobo boca boce bock boco boea boec boee boef boeo boet bofa bofe boff boka boke boko boob booc booe boof book boot bota botb bote boto bott btaa btaf btcc btec btek btfc btob bttb c-bo caaa caab caac caaf caat caba cabe cabf cabo cac- caca cacc cace cack caco caec cafa cafb cafc cafe caff caka cake cat- cata catb catc cate catf cato catt cbac cbat cbbc cbca cbcc cbce cbct cbea cbec cbee cbef cbet cbfb cbfc cbka cbko cbot cbta cbtc cbtf ccaa ccab ccac ccaf ccat ccba ccbc ccca cccb cccc cccf ccee ccfa ccfc ccff ccob ccoc cctb cctc cctt ceac ceat ceba cec- ceca cece ceco cect ceeb ceec cef- cefa cefc ceke cet- ceta cete ceto cfaa cfab cfac cfae cfao cfbc cfbt cfca cfcb cfcf cfco cffb cfoa cfta cftc cfte cftk ckac ckat ckbc ckbe ckck ckco ckoa ckob ckoc ckoo ckot cktb coak coat coba cobb cobe cobo coca coce cock coco coct cofc cofe coff coft cok- coka coke coko coob coof cook coot cota cotb cotc cote coto cott ctab ctae ctba ctca ctcf ctec ctfc ctfo ctot ctta eaaf eaba eaca eacc eaec eafb eata eate ebac ebba ebbc ebbo ebcc ebfc eboe eboo ecaa ecac ecao ecat ecbc ecbe ecca eccb eccc ecce ecco ecct ecef ecfa ecfc ecka ecko eco- ecot ect- ecta ectc ectf ecto eeca