aaaa aaab aaad aaal aaba aabb aabd aabl aabt aada aadt aala aald aall aata aatt abaa abab abad abal abat abb- abba abbb abbt abda abla abta adaa adab adad adal adat adba adda addd addl adta alaa alad alal alat alb- alba ald- alda aldl all- alla alll alta at-l at-t ataa atab atad atal atat atdt atla atta baaa baad baal baat baba babb bada badb badd bala bald ball balt bata batt bbad bbbb bbdd bblb blaa blab blad blat blbt btaa btdt btla bttb daab daad daal daba dabb dabt dada dala dall dalt data datt dbtt dddd dlab dlbd dtaa dtla laaa laad laal laat laba lada ladd lala lald lall lata latd latt llat lldb llll ltbl taa- taal taat taba tabb tabl tada tala tall tata tatb tatt tbta tdal tddb ttab ttbb tttt