-al -ol a-a a-b a-c a-t aaa aab aac aaf aal aao aat ab- aba abb abc abf abl abo abt ac- aca acb acc acf acl aco act af- afa afb afc aff afl afo aft al- ala alb alc alf all alo alt aoa aob aoc aof aol aoo aot at- ata atb atc atf atl ato att baa bab bac baf bal bao bat bba bbb bbc bbf bbl bbo bbt bca bcb bcc bcf bcl bco bct bfa bfb bfc bff bfl bfo bft bla blb blc blf bll blo blt boa bob boc bof bol boo bot bta btb btc btf btl bto btt c-- caa cab cac caf cal cao cat cba cbb cbc cbf cbl cbo cbt cca ccb ccc ccf ccl cco cct cfa cfb cfc cff cfl cfo cft cl- cla clb clc clf cll clo clt co- coa cob coc cof col coo cot cta ctb ctc ctf ctl cto ctt faa fab fac faf fal fao fat fba fbb fbc fbf fbl fbo fbt fca fcb fcc fcf fcl fco fct ffa ffc fff ffl ffo fft fla flb flc flf fll flo flt foa fob foc fof fol foo fot fta ftb ftc ftf ftl fto ftt la- laa lab lac laf lal lao lat lba lbb lbc lbf lbl lbo lbt lca lcb lcc lcf lcl lco lct lfa lfb lfc lff lfl lfo lft lla llb llc llf lll llo llt loa lob loc lof lol loo lot lta ltb ltc ltf ltl lto ltt oaa oab oac oaf oal oao oat ob- oba obb obc obf obl obo obt oc- oca ocb occ ocf ocl oco oct of- ofa ofb ofc off ofl ofo oft ola olb olc olf oll olo olt oo- ooa oob ooc oof ool ooo oot ot- ota otb otc otf otl oto ott taa tab tac taf tal tao tat tba tbb tbc tbf tbl tbo tbt tca tcb tcc tcf tcl tco tct tfa tfb tfc tff tfl tfo tft tla tlc tlf tll tlo tlt to- toa tob toc tof tol too tot tta ttb ttc ttf ttl tto ttt

aaaa aaab aaac aaaf aaal aaba aabb aabc aabl aabt aaca aacb aacc aacf aacl aaco aact aafa aafb aafc aaff aafl aala aalc aall aalo aaoo aata aatc aatf aatt abaa abab abac abaf abal abat abb- abba abbb abbo abbt abca abcb abcc abcf abcl abct abff abla ablo aboa abob abof 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 afao afat afca afcb afcc affa affc affo afft afla aflc afoa afol afoo afta aftc alaa alac alal alao alat alb- alba albc albo alca alcc alco alfa all- alla alll allo aloa aloc alof alol aloo alot alta alto aoba aoca aola aotc aotf at-l at-t ataa atab atac atal atat atca atcc atcf atcl atco atfb atfc atla atlo atob atoc atof atol atot atta atto baaa baaf baal baat baba babb babo bac- baca bacc baco bact bafc baff bafo baft bala balc balf 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 blat blbt blfc blob bloc bloo blot boab boac boal boat boba bobb bobo boca boco bofa boff bola boll bolo bolt boob booc boof 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 caco cafa cafb cafc caff cafl cala calc calf call calo calt caol cat- cata catb catc catf cato catt cbac cbal cbat cbbc cbca cbcc cbcl cbct cbfb cbfc 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 cftl clab claf clat clob clof cloo clot cltb cltc coal coat coba cobb cobo coca coco coct cofc coff coft col- cola colb coll colo colt coob coof cool coot cota cotb cotc coto cott ctab ctal ctba ctca ctcf ctfc ctfo ctol ctot ctta faaa faac faba fabo faca facc fact fafa fafc faff fafo fala falc fall falo falt fata fatc fatf fato fatt fbla fcab fcal fcat fcba fcca fccf fcot fcto ffcc ffff fftf flab flac flao flat flcl flob floc floo flot foaf foal foba fobt foca foco fofo fola folc foll folo folt foof fool foot fota foto fott ft-c ft-l ftfc ftlb laaa laac laal laat laba labo laca lacc lacl laco lact lafb lafc laff laft lala lall lalo lata latc lato latt lbcc lcac lcat lcbc lcca lccc lcfc lctl lcto lfat lfca lfcc llao llat llcc lllc llll lloa lloc lloo loac loaf loat lob- loba lobb lobo loca locc loco lofa loff loft lola loll lolo loob looc loof lool loot lota lotl loto lott ltac ltbf ltbl ltcc ltfc lttc oafc oafo oall obal obba obbo obla obol obot ocab ocac ocal ocat ocbc occa occc occt ocfa oclc oct- octa octo ofcl off- offa offc offo ofla ofta olac olaf olat olba olbo olca olcc olfa olla ollo olof olot olta ooaa ooba ooff oola oolo oooo ootb otac otcl otfc oto- otof otoo otta otto taa- taaf taal taat taba tabb tabc tabl tabo taca tacc tacl taco tact tafa tafc taff tafo taft tala talc tall talo taoa tata tatb tato tatt tbaf tbca tbcb tbcc tbta tcca tccc tcfc tctc tfal tfca tfot tftc tlac tlco toab toal toat toba tobo tobt toca toco tofa toff tofo toft tol- tola toll tolo tolt tooa toof tool toot tota totc toto tott