a-ha aaaa aaab aaac aaah aaba aabb aabc aabh aabt aaca aacb aacc aach aaco aact aaha aaoo aata aatc aatt abaa abab abac abat abax abb- abba abbb abbo abbt abca abcb abcc abch abct abha abho aboa abob aboh aboo abot abox abta ac-t acaa acab acac acat acba acca accc acch acco acct acha achh acho acht acoa acoh acot acta actc acth acto actt ahab ahac ahah ahat ahha ahoa ahot ahta ahto aoah aoba aoca aotc at-t at-x ataa atab atac atat atax atca atcc atch atco atha atho atob atoc atot atta atto axat axo- axoa axto axxo ba-x baaa baah baat baba babb babo bac- baca bacc bach baco bact baha baho baht baoh bata batc bath bato batt baxt bbbb bbch bbox bcaa bcat bcbc bcca bccc bctc bhao bhat bhca bhcc bhot boab boac boat boba bobb bobo boca boch boco boha boho boht boob booc booh boot boox bota botb both boto bott boxa btaa btcc btcx btob bttb c-bo caaa caab caac caah caat caba cabo cac- caca cacc cach caco caha caht cat- cata catb catc cath cato catt caxa cbac cbat cbax cbbc cbca cbcc cbct cbha cbot cbox cbta cbtc cbxa ccaa ccab ccac ccat ccba ccbc ccca cccb cccc ccha ccob ccoc cctb cctc cctt chaa chab chac chah chao chat chax chca chch chha choc choh choo chto chtt coat coax coba cobb cobh cobo coca coch coco coct coha coho coob cooh coot cota cotb cotc coth coto cott coxa ctab ctba ctca ctot ctta cxxx haab haat haba habo habt haco haha haho haht hata hatb hath hato hatt haxo hboc hbox hcat hcbc hcca hccb hccc hcch hhaa hhat hhhh hoac hoat hoax hoba hobo hoca hoch hoha hoho hoot hoox hota hotb hoth hoto hott hoxa htab htcc htoh oath obba obbo obot obox ocab ocac ocat ocbc occa occc occt ocha ocht oct- octa octo ohba ohcc ohho ohob ohoh ohta ohto ooaa ooba ooha ooho oooh oooo ootb otac otha otho oto- otoh otoo otta otto oxa- oxo- oxox oxxo taa- taat taba tabb tabc tabo taca tacc tach taco tact taha taho taoa tata tatb tath tato tatt tax- taxa taxo taxt tbca tbcb tbcc tbox tbta tcca tccc tch- tcha tchh tcho tctc thaa thao that thax thca thch thoo thot thtb toab toat toba tobo tobt toca toch toco toho tooa tooh toot tota totc toth toto tott tox- toxa toxo toxt ttab ttbb tttt txaa xact xbox xcat xobc xoca xoco xoth xoxo xxxo xxxx