-ase a-be aaaa aaab aaae aaas aaba aabb aaea aaes aasa aase aass abaa abab abae abas abax abb- abba abbb abbe abbs abee abes abs- absa abse abss aeas aebs aess asaa asab asae asas asba asea asee ases assa asse asss axes axse ba-x baaa baas baba babb babe babs baes basa base bass bbas bbbb bbbs bbeb beas beba bebb bebe beeb bees bes- besa bese bess bsaa bsas bsea bseb bsee bses bsse eaba easa ease ebba ebbs ebes ebsa eeea eeee eees eese esab esas esba esbs esea esee eses essa esse exa- exes sa-x saab saae saas saba sabb sabe sabs saeb saes saex sasa sase sass saxa saxe sbaa sbas sbbs sbsa sbse se-e se-s se-x seaa seab seas seax seba sebe sebs seea seeb sees seex sesa sese sess sex- sexe ssaa ssab ssas ssee sses ssex sssa sssb ssss xbee xexe xxxx