a-be a-ha aaaa aaab aaac aaae aaah aaba aabb aabc aabh aaca aacb aacc aace aach aacu aaea aaec aaha abaa abab abac abae abau abb- abba abbb abbe abca abcb abcc abch abec abee abha abua abue acaa acab acac acae acba acca accc acce acch accu ace- acea acec aceh acha ache achh achu acu- acue aeac aecb ahab ahac ahah ahau ahha ahua auaa aube auca auce auch baaa baah baba babb babe babu bac- baca bacc bace bach baha bahu bau- bbau bbbb bbch bbeb bcaa bcbc bcca bccc bcec bche bcuc beah beau beba bebb bebe beca bech becu beeb bhca bhcc bhuu buba bubb bube bubu buca bucc buce buch bucu buea bueu buha buhe caaa caab caac caah caba cabe cabu cac- caca cacc cace cach caec caeu caha cahe cauc cbac cbbc cbca cbcc cbce cbcu cbea cbec cbee cbha ccaa ccab ccac ccba ccbc ccca cccb cccc cccu ccee ccha cche ccuc ceac ceba cebu cec- ceca cece ceeb ceec chaa chab chac chae chah chau chca chce chch chea cheb chec chee cheh cheu chha chua chub cuau cub- cuba cubb cube cuca cucc cuce eaba eabh eaca eacc each eaec ebac ebba ebbc ebcc ecaa ecac ecbc ecbe ecca eccb eccc ecce echa eche ecua eeca eeea eeee ehaa ehcc ehea eheh eheu euba eubc euch haab haba habe habu hace haec haha hau- haue hcbc hcca hccb hccc hcch heah hebb hebe heca hech heeb hehe heue hhaa hhhh huac huah huba hubb hube huch hucu huea huhu huub uabc uaca uaua ubac ubba ubbe ucbc ucca ucea ucha uche ucua ueba uhuh uuuu