Searches for words "hidden" in long strings of text. In this case the entire book of of Moby Dick.
The "hidden" words are found by taking the given text and removing all spaces and punctuation, then looking for the letters in each word equally spaced from on another.
Based on the letter frequency of the text of Moby Dick you would expect to find "DAN" 21,026 times, but in fact you only find it 20,589 times (assuming a letter skip of no more than 100).
Written in Visual Basic 6 by Dan Dixon.