The third word wasn't a word at all, but a series of numbers and letters.

The debate was carried out from 2001 to 2003 through a series of published articles and open letters.

A. The fact that these are a series of letters exchanged between two people is extraordinary.

Both are told through a series of letters and memoirs.

He first wrote a series of published letters opposing the American actions.

It's your job to type the correct series of letters into a form.

The book is a series of letters to her six children, either grown, or nearly so.

The story is told in a series of letters.

Panille called out a series of letters and numbers to her.

He tries to get her back with a series of letters.