EXUDE
IF 2, U must be letter 3 and D must be letter 4. EX__E is eliminated from EXILE.
EDIT: No other assumptions can be made with EXUDE-0 and EXUDE-1 unless MOUNT comes back as MOUNT-1 (in which case, O will be letter 2, but this IF statement is already too long, and likely against the rules...so don't count the second letter as O if MOUNT-1).