Excel data arrangement

I have two columns with over a 20000 rows. The first column contains name of the elements Cu and Zr randomly arranged. The other column has the type which are two numbers 1 and 2 also randomly arranged. I want to assign number 1 to Cu and no 2 to Zr how should I do that?

thanks
Van

so the data is like this:
Column A
Elment
Zr
Cu
Zr
Cu
Zr
Cu
Zr
Zr
Cu
Zr
Zr
Zr
Cu
Cu
Zr
Zr
Cu
Cu
Zr
Zr
Zr
Zr
Cu
Zr
Cu
Zr
Zr
Cu

ColumnB
type
1
1
1
1
1
1
1
2
2
2
2
2
2

as I mentioned there are tonnes of rows and I want the output as
Zu 2
Cu 1
Zr 2
Cu 1
......
and so on its like wherever I have Zr I want the type 2 and for Cu as 1.

thanks