? or - or .: Matches any single character.
*: Matches a variable number of characters, including the possibility of none.
@: Matches any vowel.
#: Matches any consonant.
1..9: Matches words with the same letter in all the places where the number is specified (works with 1 to 9).
[..]: Matches one of the characters from the letters within the square brackets.
{..}: This position may not have any of the letters from the letters within the curly brackets. If the search filter "exclude letters" is used -- these are excluded too.