Symbol explanation

? 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.