One morning a little old lady wanders into a local fishmongers and asked for a piece of cod, the Fishmonger said I'm sorry Madam we are out of cod till tomorrow come back then , ok said the lady and goes on her way.
Around lunchtime she comes back in and the Fishmonger says what can I get you Madam, I'd like a nice piece of cod please, sorry Madam as I've already said we won't have any in till tomorrow come back then. ok she says and wanders off.
Later in the day at closing time she comes in again and the Fishmonger rolls his eyes and asks exasperatedly what would like Madam. I'd like a nice piece of cod please.
How do you spell cod madam? c o d she replied, no it isn't it's spelled c o f d said the Fishmonger.
She thinks about it for a minute and then says there is no f in cod! The Fishmonger replied that's what I've been trying to tell you!