aaaa aaab aaac aaal aaba aabb aabc aabl aabt aaca aacb aacc aacl aaco aact aala aalc aall aalo aaoo aata aatc aatt abaa abab abac abal abat abax abb- abba abbb abbo abbt abca abcb abcc abcl abct abla ablo aboa abob abol aboo abot abox abta ac-t acaa acab acac acat acba acbl acca accc acco acct acla aclc acoa acol acot acta actc actl acto actt alaa alac alal alao alat alb- alba albc albo alca alcc alco all- alla alll allo aloa aloc alol aloo alot alta alto altx alxa aoba aoca aola aotc at-l at-t at-x ataa atab atac atal atat atax atca atcc atcl atco atla atlo atob atoc atol atot atta atto axal axat axo- axoa axto axxo ba-x baaa baal baat baba babb babo bac- baca bacc baco bact bala balc ball balo balt baol bata batc bato batt baxt bbbb bblb bbox bcaa bcat bcbc bcca bccc bccl bctc blaa blab blac blat blbt blob bloc bloo blot boab boac boal boat boba bobb bobo boca boco bola boll bolo bolt boob booc bool boot boox bota botb boto bott boxa btaa btcc btcl btcx btla btob bttb c-bo caaa caab caac caal caat caba cabo cac- caca cacc caco cala calc call calo calt calx caol cat- cata catb catc cato catt caxa cbac cbal cbat cbax cbbc cbca cbcc cbcl cbct cblb cblc cbol cbot cbox cbta cbtc cbtl cbxa ccaa ccab ccac ccat ccba ccbc ccca cccb cccc cccl ccla cclc cclx ccob ccoc cctb cctc cctl cctt ccxl clab clat clob cloo clot clox cltb cltc clxx coal coat coax coba cobb cobo coca coco coct col- cola colb coll colo colt coob cool coot cota cotb cotc coto cott coxa ctab ctal ctba ctca ctol ctot ctta cxxx laaa laac laal laat laax laba labo laca lacc lacl laco lact lala lall lalo lata latc lato latt laxa laxo lbcc lcac lcat lcbc lcca lccc lctl lcto llao llat llcc lllc llll lloa lloc lloo loac loat lob- loba lobb lobo loca locc loco lola loll lolo loob looc lool loot lota lotl loto lott lox- loxa loxo ltac ltbl ltcc lttc lxxx oall obal obba obbo obla obol obot obox ocab ocac ocal ocat ocbc occa occc occt oclc oct- octa octo olac olat olax olba olbo olca olcc olla ollo olot olta ooaa ooba oola oolo oooo ootb otac otcl oto- otoo otta otto oxa- oxal oxo- oxox oxxo taa- taal taat taba tabb tabc tabl tabo taca tacc tacl taco tact tala talc tall talo talx taoa tata tatb tato tatt tax- taxa taxo taxt tbca tbcb tbcc tbox tbta tcca tccc tclx tctc tlac tlco tltx toab toal toat toba tobo tobt toca toco tol- tola toll tolo tolt tooa tool toot tota totc toto tott tox- toxa toxo toxt ttab ttbb tttt txaa xacl xact xala xall xbox xcal xcat xcbl xloc xlox xobc xoca xoco xolo xoxo xtal xtol xxxo xxxx