10. The method as in claim 7 wherein adjusting the letters in the words of the first group of words includes: deleting exactly one letter from a particular word of the first group of words to form a particular word of the second group of words.
7. The method as in claim 1 wherein modifying at least some of the words in the first group of words includes: adjusting letters in words of the first group of words to form the second group of words.