trim / sort object names

Hello everyone,
I have below questions:

1> I have a list of points named as A1,B1,C1,D1... for some instances i want to remove the numbers from the end of the name...

2> also i have a point list with names such as A1 to A3, B1 to B3, C1 to C3 and so on... while sorting the list i get the result as A1,A2,A3,B1,B2,B3... but i want my result to be A1,B1,C1 / A2,B2,C2 / A3,B3,C3...

could someone help me with the above issues...

Thanks