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 abb- abba abbb abbo abbt abca abcb abcc abch abct abha abho aboa abob aboh aboo abot 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 ataa atab atac atat atca atcc atch atco atha atho atob atoc atot atta atto baaa baah baat baba babb babo bac- baca bacc bach baco bact baha baho baht baoh bata batc bath bato batt bbbb bbch 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 bota botb both boto bott btaa btcc 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 cbac cbat cbbc cbca cbcc cbct cbha cbot cbta cbtc ccaa ccab ccac ccat ccba ccbc ccca cccb cccc ccha ccob ccoc cctb cctc cctt chaa chab chac chah chao chat chca chch chha choc choh choo chto chtt coat coba cobb cobh cobo coca coch coco coct coha coho coob cooh coot cota cotb cotc coth coto cott ctab ctba ctca ctot ctta haab haat haba habo habt haco haha haho haht hata hatb hath hato hatt hboc hcat hcbc hcca hccb hccc hcch hhaa hhat hhhh hoac hoat hoba hobo hoca hoch hoha hoho hoot hota hotb hoth hoto hott htab htcc htoh oath obba obbo obot 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 taa- taat taba tabb tabc tabo taca tacc tach taco tact taha taho taoa tata tatb tath tato tatt tbca tbcb tbcc tbta tcca tccc tch- tcha tchh tcho tctc thaa thao that thca thch thoo thot thtb toab toat toba tobo tobt toca toch toco toho tooa tooh toot tota totc toth toto tott ttab ttbb tttt