Is there a program out there that, if you were to put in a series of letters let's say teyruiocvlk for purpose of explanation, is there a program out there that could give you all the possible words from the letters entered, without using every letter for every word.

To help you better understand

I overlooked someone entering their password, I don't know what exactly they typed in, but I could see the general area of keys they used. So is there a program in which I can enter a series of letters, and it will give me all the possible word combinations?