a-ha aaaa aaab aaac aaad aaah aaba aabb aabc aabd aabh aaca aacb aacc aacd aach aada aadc aaha abaa abab abac abad abb- abba abbb abca abcb abcc abcd abch abda abha acaa acab acac acad acba acca accc accd acch acda acdb acdc acha achh adaa adab adac adad adah adba adbc adcc adda addc addd adha adhd ahab ahac ahad ahah ahha baaa baad baah baba babb bac- baca bacc bach bada badb badd badh baha bbad bbbb bbch bbdd bcaa bcbc bcca bccc bcda bchd bdbc bddc bddh bhca bhcc c-cd caaa caab caac caah caba cac- caca cacc cach cada cadc cadd caha cbac cbbc cbca cbcc cbdb cbdc cbha ccaa ccab ccac ccad ccba ccbc ccca cccb cccc ccdc ccdh ccha cdaa cdac cdad cdba cdda cddb chaa chab chac chad chah chca chch chha daab daad daba dabb daca dada daha dbcc dcbc dcca dccb dccc dcdb dddd dhaa dhad haab haad haba hada hadh haha hbcd hcbc hcca hccb hccc hcch hdca hdda hhaa hhhh