Formula help
 

I need help.
Cell S2 has a value of "F" or "U"

Cell T2 needs function that will show:
when cell S2 is "F" the formula in T2 would show "D".

when cell S2 is "U" Vlookup to a table and the table output could either be "D" or "W" in Cell T2.
Can I get there with one function in cell T2?
Thank YOU in advance.
V/r