a-ha a-ya aaaa aaab aaac aaah aaba aabb aabc aabh aaby aaca aacb aacc aach aacy aaha abaa abab abac abay abb- abba abbb abby abca abcb abcc abch abha abyc abyy acaa acab acac acba acca accc acch accy acha achh achy ahab ahac ahah ahha ayah ayay ayca ayya baaa baah baba babb baby bac- baca bacc bach baha baya bayh bbay bbbb bbch bcaa bcbc bcca bccc bhca bhcc bych caaa caab caac caah caba caby cac- caca cacc cach caha cbac cbbc cbca cbcc cbha ccaa ccab ccac ccba ccbc ccca cccb cccc ccha cchy chaa chab chac chah chay chca chch chha chy- chyc cya- cyaa cyba cybb cybc cyc- cyca cycb cycc cyy- cyyc haab haba haby haha haya hcbc hcca hccb hccc hcch hhaa hhhh yaba yacc yacy yaya ycab yccc ycch yyyy