Get Actual Number From 2 Cells?

I need to find a number (1, 2 or 3) and I am looking in two different cells for it. Now, Cell 1 might have the information; Cell 2 might have the information or BOTH Cells A AND B might have the information, or either cell (or both) might have different information. I can't do an IF/OR because I don't know which cell will have it, nor can I do an IF/AND for the same reason. I can't assume that they will both have the information -- so I can't just use a solution that includes a "divided by."

for example:

A
1 2
2 0

or maybe

A
1 3
2 3

or

A
1 4
2 1

If A1 or A2 is > 0, but <4, then that number