aaaa aaab aaac aaad aaam aaba aabb aabc aabd aabm aaca aacb aacc aacd aacm aada aadc aama aamb aamc aamd abaa abab abac abad abam abb- abba abbb abca abcb abcc abcd abda abma abmb abmc acaa acab acac acad acba acca accc accd accm acda acdb acdc acdm acma acmc adaa adab adac adad adam adba adbc adcc adda addc addd adma admb amaa amac amad amam amb- amba amca amcc amda amm- amma baaa baad baam baba babb babm bac- baca bacc bada badb badd bama bamb bamc bamm bbad bbbb bbcm bbdd bcaa bcam bcbc bcca bccc bccm bcda bcma bdbc bddc bmaa bmdb c-cd caaa caab caac caam caba cac- caca cacc cacm cada cadc cadd cadm cama camb camc camm cbac cbbc cbca cbcc cbcm cbdb cbdc ccaa ccab ccac ccad ccam ccba ccbc ccca cccb cccc cccm ccdc ccdm ccma ccmb ccmc ccmd ccmm cdaa cdac cdad cdba cdda cddb cdma cmaa cmac cmba cmbc cmcc cmda cmdb cmmb cmmc daab daad daam daba dabb daca dada dama damb damm dbcc dcbc dcca dccb dccc dcdb dcma dddd dmaa dmab dmac dmba dmcc dmcm dmdc maaa maac maad maam maba mac- maca macb macc macd mada madb madc madd mama mamc mbac mbam mbba mbca mbda mbdb mcaa mcac mcad mcba mcbc mcca mccc mccd mcdc mcdd mcmc mdac mdca mdcc mddm mdma mdmc mmaa mmab mmac mmcc mmcd mmcm mmda mmdb mmdc mmmc mmmd mmmm