aaaa aaab aaaf aaam aaar aaba aabb aabm aabt aafa aafb aaff aama aamb aamr aara aarm aart aata aatf aatt abaa abab abaf abam abar abat abb- abba abbb abbr abbt abff abma abmb abmt abra abta afaa afam afar afat affa afft afma afr- afra afrm afta amaa amam amar amat amb- amba ambr amfm amfr amm- amma amra amta arab araf aram arar arat arba arfa arfb arff arft arma armm armt arr- arra arrr arrt arta artr at-t ataa atab atar atat atfb atm- atma atra atrm atta attr baaa baaf baam baar baat baba babb babm babr baff baft bama bamb bamf bamm bar- bara barb barf barm barr bart bata batf batt bbbb bfta bftt bmaa brab braf bram brat brfm brrm brrr btaa btaf btrt bttb faaa faam faba fabm fafa faff fama fara farb farm farr fart fata fatf fatt fbar ffar ffff ffrr fftf frab fram frat frta ftam maaa maaf maam maar maat maba mafa mafb maff mama mamf mar- mara marf marm marr mart mata matr matt mbam mbba mbta mfbm mffa mftf mmaa mmab mmar mmff mmmm mmrf mrbb mrbm mrta mrtm mrtt mtaa mtab mtff mtrr mttr raab raaf raam raat raba rabb rafa raff raft rama ramb ramm rara rarb rarf rata ratf ratt rbaf rbbb rbbr rfam rmaf rrat rrrr rtbf rtfb rtfm taa- taaf taar taat taba tabb tafa taff taft tama tamm tara tarb tarf tarm tarr tart tata tatb tatr tatt tbaf tbar tbrb tbta tfam tmaa tmbr tmtt traa trab traf tram trat trfm trfr trma trmb trra trtr ttab ttbb ttfa ttff ttma tttt