LinuxQuestions.org - Create typing shortcuts in command line

I want to create a shortcut to an expression I use a lot on the command line.
However, as certain parts of this expression need to be changed each time I use it, the "alias" function is not what I want.
So, basically, I would like to type something like

Code:

A=abcdefghijklmnopqrstuvwxyz

Then when I want to use a modified version of the expression A, I could type A in a terminal but it would NOT execute.
Instead the expression is printed and allows me to modify it before I press enter to execute.
Can't seem to find how to do this.
Any clues?
Thanks