yaffs ayffs yfafs fyafs afyfs fayfs yaffs ayffs yfafs fyafs afyfs fayfs yffas fyfas yffas fyfas ffyas ffyas affys fafys affys fafys ffays ffays yafsf ayfsf yfasf fyasf afysf faysf yasff aysff ysaff syaff asyff sayff yfsaf fysaf ysfaf syfaf fsyaf sfyaf afsyf fasyf asfyf safyf fsayf sfayf yafsf ayfsf yfasf fyasf afysf faysf yasff aysff ysaff syaff asyff sayff yfsaf fysaf ysfaf syfaf fsyaf sfyaf afsyf fasyf asfyf safyf fsayf sfayf yffsa fyfsa yffsa fyfsa ffysa ffysa yfsfa fysfa ysffa syffa fsyfa sfyfa yfsfa fysfa ysffa syffa fsyfa sfyfa ffsya ffsya fsfya sffya fsfya sffya affsy fafsy affsy fafsy ffasy ffasy afsfy fasfy asffy saffy fsafy sfafy afsfy fasfy asffy saffy fsafy sfafy ffsay ffsay fsfay sffay fsfay sffay
Note: these 'words' (valid or invalid) are all the permutations of the word yaffs. These words are obtained by scrambling the letters in yaffs.