Hello, I need some help navigating the word search function. I am searching a large text document (1,856 pages). Within the pages are random nucleotide sequences. I am trying to search for characters that are known and characters that are unknown for example: I need to know all CCACxxxGGA phrases in my document, where x represents any alphabetical letter. Does anyone know how to search for something like this? If not, can you refer me to a program that would allow me to complete such a query.

Thank You