hobby ohbby hboby bhoby obhby bohby hobby ohbby hboby bhoby obhby bohby hbboy bhboy hbboy bhboy bbhoy bbhoy obbhy bobhy obbhy bobhy bbohy bbohy hobyb ohbyb hboyb bhoyb obhyb bohyb hoybb ohybb hyobb yhobb oyhbb yohbb hbyob bhyob hybob yhbob byhob ybhob obyhb boyhb oybhb yobhb byohb ybohb hobyb ohbyb hboyb bhoyb obhyb bohyb hoybb ohybb hyobb yhobb oyhbb yohbb hbyob bhyob hybob yhbob byhob ybhob obyhb boyhb oybhb yobhb byohb ybohb hbbyo bhbyo hbbyo bhbyo bbhyo bbhyo hbybo bhybo hybbo yhbbo byhbo ybhbo hbybo bhybo hybbo yhbbo byhbo ybhbo bbyho bbyho bybho ybbho bybho ybbho obbyh bobyh obbyh bobyh bboyh bboyh obybh boybh oybbh yobbh byobh ybobh obybh boybh oybbh yobbh byobh ybobh bbyoh bbyoh byboh ybboh byboh ybboh
Note: these 'words' (valid or invalid) are all the permutations of the word hobby. These words are obtained by scrambling the letters in hobby.