I interpreted "oo" (egg) as "oo" (thu) they sound very much alike. So my answer was "I am seeing you." Clearly that is not what they were looking for, but I am not sure why. How would you say "I see you" or "I am seeing you"?
Tha mi gad faicinn.
gad = aig do = at your
So "I am at your seeing."
That sounds so similar to a' faighinn.