two id's on network

We purchased a company and they have a different nameing convention.

Some machines i log in with user name alpha and some with user id beta.

I never know if I my user id is alpha or beta.

I have a script ./alphalogin that I run to get in.  If that is not successfull I run the script ./betalogin.

I do this all the time.  I would like some sort of script that if I do not get in as apha I can do a control c  and then it would ask for my user id again while it trys with user id beta.

If I have not explained this that well, just look at the problem, and solve it inside or outside of the box.   2 ids and I never know which one is right.  I can not put my password in a script

bash / ksh / redhat / solaris