-al -ol a-a a-b a-c a-t aaa aab aac aaf aak aal aao aat ab- aba abb abc abf abk abl abo abt ac- aca acb acc acf ack acl aco act af- afa afb afc aff afk afl afo aft aka akb akc akk akl ako al- ala alb alc alf alk all alo alt aoa aob aoc aof aok aol aoo aot at- ata atb atc atf atl ato att baa bab bac baf bak bal bao bat bba bbb bbc bbf bbk bbl bbo bbt bca bcb bcc bcf bck bcl bco bct bfa bfb bfc bff bfl bfo bft bka bkb bkc bkf bkk bkl bko bkt bla blb blc blf blk bll blo blt boa bob boc bof bok bol boo bot bta btb btc btf btk btl bto btt c-- caa cab cac caf cak cal cao cat cba cbb cbc cbf cbk cbl cbo cbt cca ccb ccc ccf cck ccl cco cct cfa cfb cfc cff cfk cfl cfo cft cka ckb ckc cko ckt cl- cla clb clc clf clk cll clo clt co- coa cob coc cof cok col coo cot cta ctb ctc ctf ctk ctl cto ctt faa fab fac faf fak fal fao fat fba fbb fbc fbf fbk fbl fbo fbt fca fcb fcc fcf fck fcl fco fct ffa ffc fff ffk ffl ffo fft fka fkb fkc fkf fkk fkl fkt fla flb flc flf fll flo flt foa fob foc fof fok fol foo fot fta ftb ftc ftf ftk ftl fto ftt k-t ka- kaa kab kac kaf kak kal kao kat kba kbb kbc kbf kbk kbl kbo kca kcb kcc kck kcl kct kfa kfc kff kfo kkb kkc kkk kkl kkt kl- kla klb klc klf klo klt koa kob koc kof kok kol koo kot kta ktb ktc ktf ktk ktl kto ktt la- laa lab lac laf lak lal lao lat lba lbb lbc lbf lbk lbl lbo lbt lca lcb lcc lcf lck lcl lco lct lfa lfb lfc lff lfk lfl lfo lft lka lkb lkl lkt lla llb llc llf llk lll llo llt loa lob loc lof lok lol loo lot lta ltb ltc ltf ltk ltl lto ltt oaa oab oac oaf oak oal oao oat ob- oba obb obc obf obk obl obo obt oc- oca ocb occ ocf ock ocl oco oct of- ofa ofb ofc off ofl ofo oft oka okb okc okk okl oko ola olb olc olf olk oll olo olt oo- ooa oob ooc oof ook ool ooo oot ot- ota otb otc otf otk otl oto ott taa tab tac taf tak tal tao tat tba tbb tbc tbf tbk tbl tbo tbt tca tcb tcc tcf tck tcl tco tct tfa tfb tfc tff tfk tfl tfo tft tka tkb tkc tkk tkl tko tkt tla tlc tlf tlk tll tlo tlt to- toa tob toc tof tok tol too tot tta ttb ttc ttf ttk ttl tto ttt

a-ak a-ok aaaa aaab aaac aaaf aaal aaba aabb aabc aabl aabt aaca aacb aacc aacf aack aacl aaco aact aafa aafb aafc aaff aafl aaka aala aalc aall aalo aaoo aata aatc aatf aatk aatt abaa abab abac abaf abak abal abat abb- abba abbb abbo abbt abca abcb abcc abcf abcl abct abff abla ablo aboa abob abof abok abol aboo abot abta ac-t acaa acab acac acat acba acbl acca accc accf acco acct acfc acfl acft acla aclc acoa acol acot acta actc actf actl acto actt afaa afak afao afat afca afcb afcc affa affc affo afft afka afla aflc afoa afol afoo afta aftc akaa akal akao akca akka akko aklo akok akot alaa alac alak alal alao alat alb- alba albc albo alca alcc alco alfa alk- alka alkb alko all- alla alll allo aloa aloc alof alok alol aloo alot alta alto aoba aoca aola aotc aotf at-l at-t ataa atab atac atak atal atat atca atcc atcf atck atcl atco atfb atfc atka atkt atla atlo atob atoc atof atok atol atot atta atto baaa baaf baak baal baat baba babb babo bac- baca bacc back baco bact bafc baff bafo baft bak- baka bakl bako bakt bala balc balf balk ball balo balt baol bata batc batf bato batt bbbb bbfc bblb bcaa bcat bcbc bcca bccc bccl bcfc bcof bctc bfca bffl bfta bftt blaa blab blac blak blat blbt blfc blkb blob bloc blok bloo blot boab boac boak boal boat boba bobb bobo boca bock boco bofa boff boka boko bola bolk boll bolo bolt boob booc boof book bool boot bota botb boto bott btaa btaf btcc btcl btfc btla btob bttb c-bo caaa caab caac caaf caal caat caba cabf cabo cac- caca cacc cack caco cafa cafb cafc caff cafl caka cala calc calf calk call calo calt caol cat- cata catb catc catf cato catt cbac cbal cbat cbbc cbca cbcc cbcl cbct cbfb cbfc cbka cbkl cbko cblb cblc cbol cbot cbta cbtc cbtf cbtl ccaa ccab ccac ccaf ccat ccba ccbc ccca cccb cccc cccf cccl ccfa ccfc ccff ccfl ccla cclc ccob ccoc cctb cctc cctl cctt cfaa cfab cfac cfao cfbc cfbt cfca cfcb cfcf cfcl cfco cffb cfoa cfta cftc cftk cftl ckac ckat ckbc ckck ckcl ckco cklf ckoa ckob ckoc ckoo ckot cktb clab claf clat clob clof clok cloo clot cltb cltc coak coal coat coba cobb cobo coca cock coco coct cofc coff coft cok- coka coko col- cola colb colk coll colo colt coob coof cook cool coot cota cotb cotc coto cott ctab ctal ctba ctca ctcf ctfc ctfo ctol ctot ctta f--k faaa faac faba fabo faca facc fack fact fafa fafc faff fafo fako fakt fala falc falk fall falo falt fata fatc fatf fato fatt fbla fcab fcal fcat fcba fcca fccf fcot fcto ffcc ffff fftf fkab flab flac flak flao flat flcl