Explanation of the C command in EDLIN.

This command copies a group of lines to one or more areas
of the file in memory. You first type the first line number
and then the last line number, then the line number, where 
EDLIN is suppossed to copy this group in front of. After that 
you enter the number of times EDLIN should copy this group of 
lines. After all this is entered, enter the command.