By craic-ing his knuckles.
Because the rest of the letters are not-E.
Eleven. T-H-E A-L-P-H-A-B-E-T.
Rick O'Shay
A mashed potato.
2: Not much, Brian. I had a pint yesterday. 1: Oh! Really I thought you were only 15 2: I am! 1: So what was it Guiness 2: No, it was water.