adays daays aadys aadys daays adays adyas dayas aydas yadas dyaas ydaas aayds aayds ayads yaads ayads yaads dayas adyas dyaas ydaas aydas yadas adasy daasy aadsy aadsy daasy adasy adsay dasay asday saday dsaay sdaay aasdy aasdy asady saady asady saady dasay adsay dsaay sdaay asday saday adysa daysa aydsa yadsa dyasa ydasa adsya dasya asdya sadya dsaya sdaya aysda yasda asyda sayda ysada syada dysaa ydsaa dsyaa sdyaa ysdaa sydaa aaysd aaysd ayasd yaasd ayasd yaasd aasyd aasyd asayd saayd asayd saayd aysad yasad asyad sayad ysaad syaad aysad yasad asyad sayad ysaad syaad daysa adysa dyasa ydasa aydsa yadsa dasya adsya dsaya sdaya asdya sadya dysaa ydsaa dsyaa sdyaa ysdaa sydaa aysda yasda asyda sayda ysada syada
Note: these 'words' (valid or invalid) are all the permutations of the word adays. These words are obtained by scrambling the letters in adays.