aaaa aaab aaal aaba aabb aabl aabt aala aall aalo aaoo aata aatt abaa abab abal abat abax abb- abba abbb abbo abbt abla ablo aboa abob abol aboo abot abox abta alaa alal alao alat alb- alba albo all- alla alll allo aloa alol aloo alot alta alto altx alxa aoba aola at-l at-t at-x ataa atab atal atat atax atla atlo atob atol atot atta atto axal axat axo- axoa axto axxo ba-x baaa baal baat baba babb babo bala ball balo balt baol bata bato batt baxt bbbb bblb bbox blaa blab blat blbt blob bloo blot boab boal boat boba bobb bobo bola boll bolo bolt boob bool boot boox bota botb boto bott boxa btaa btla btob bttb laaa laal laat laax laba labo lala lall lalo lata lato latt laxa laxo llao llat llll lloa lloo loat lob- loba lobb lobo lola loll lolo loob lool loot lota lotl loto lott lox- loxa loxo ltbl lxxx oall obal obba obbo obla obol obot obox olat olax olba olbo olla ollo olot olta ooaa ooba oola oolo oooo ootb oto- otoo otta otto oxa- oxal oxo- oxox oxxo taa- taal taat taba tabb tabl tabo tala tall talo talx taoa tata tatb tato tatt tax- taxa taxo taxt tbox tbta tltx toab toal toat toba tobo tobt tol- tola toll tolo tolt tooa tool toot tota toto tott tox- toxa toxo toxt ttab ttbb tttt txaa xala xall xbox xlox xolo xoxo xtal xtol xxxo xxxx