1# Find words which contain the letter 'a'.
2-d \s+ a
3# Find words which contain a capital letter.
4-d \s+ [A-Z]
5# Find sentences which contain certain words.
6-d \.\s+ -M error
7-d \.\s+ -M default
8# Find paragraphs which contain "PATTERN".
9-d \n\n -M PATTERN
10