Iterate through directories and search into files

[Steve Bertrand]

Steve Bertrand wrote:
> Hi everyone,
> 
> I have a list of directories:
> 
> - a..z and 2003..2008
> 
> ...inside of a single directory.
> 
> Can someone advise what the shortest shell pipeline would be to search
> for two words (on two separate lines) within all files located only the
> alpha directories, and then print the filename to STDOUT?

...what I meant to say was that both patterns will be on the SAME line,
as a single instance example, I would do:

cat a/file.fil | grep -i comment | grep 355

Steve