Hi I have some a small problem with comparing data.

I have data on to different sheet:

Sheet A

names account no.
fred 12
Marie 54
An so on....

Sheet B also includes names and account no. but not identical to the ones in
sheet A.

Since the list is endless....more or less is is most convinient to keep the
two sheets.

The problem:

I wish to find out which names and accounts are repeated in both A and B. If
possible as an output in a blanc sheet C.

Hopefully someone can assist me. I have tried to use countif and if but have
not succeded.