[ILUG] Moving chars about within lines

[Ray Kelly]

Lo all.

I've got a number of files which I'm looking to modify, 
the current line format of each of these, is x chars which I want to
hang onto immediatly followed by y chars which I'm also looking to keep
& then the line is trailed with z chars which atm I'm not worried about.

ie. the objective is to change the format of each line in this file from 
xyz  to x,y  Does anyone have any pointers on where to find out how to
do this, as muggins has minimal knowledge of sed/awk/perl which I'd
presume would be the ways to do this (I know how to do it using excel
but I'm not even considering that option :)

thanks
	Ray ...