aaaa aaab aaac aaal aaam aaba aabb aabc aabl aabm aaca aacb aacc aacl aacm aala aalc aall aama aamb aamc abaa abab abac abal abam abb- abba abbb abca abcb abcc abcl abla abma abmb abmc acaa acab acac acba acbl acca accc accm acla aclc acma acmc alaa alac alal alam alb- alba albc albm alca alcc all- alla alll alma almc amaa amac amal amam amb- amba amca amcc amla amm- amma baaa baal baam baba babb babm bac- baca bacc bala balc ball balm bama bamb bamc baml bamm bbbb bbcm bblb bcaa bcam bcbc bcca bccc bccl bccm bcma blaa blab blac blam bmaa caaa caab caac caal caam caba cac- caca cacc cacm cala calc call calm cama camb camc caml camm cbac cbal cbbc cbca cbcc cbcl cbcm cblb cblc ccaa ccab ccac ccam ccba ccbc ccca cccb cccc cccl cccm ccla cclc cclm ccma ccmb ccmc ccmm clab clam cmaa cmac cmba cmbc cmcc cmla cmll cmmb cmmc cmml laaa laac laal laam laba laca lacc lacl lala lall lalm lama lamb lamm lbcc lbmc lcac lcbc lcca lccc lccm llcc lllc llll lmcc maaa maac maal maam maba mac- maca macb macc mal- mala mall malm mama mamc mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mccl mcla mcmc mcml mlab mlba mlcc mmaa mmab mmac mmcc mmcl mmcm mmmc mmmm