A cryptogram is a phrase or quote that has been encrypted by simple letter
substitution. The phrase 'This is a cryptogram' might turn into the
encrypted phrase:'FKDR DR U BAZOFMIAUC'
In this cryptogram you can see that throughout the phrase the letter 'T' has
been replaced by the letter 'F', the letter 'A' has been substituted with 'U',
and so on.
One important rule - a letter can never be substituted with itself.
You solve the cryptogram with a trial and error process, guessing the letters
that have been replaced. After you work on cryptograms for a while you learn
to see patterns of common words - practice makes perfect!
Here are a few tips to get you going:
The only (well...by far the most common) single letter words are 'A'
and 'I'. Look for common letter combinations, like 'QU', 'TH' & 'SH'.
The words 'THE & ARE are the most common three letter words. Watch for the
pattern XCBX. This is usually the word 'THAT'.
All words have at least one vowel (except 'WHY & 'RHYTHM').