Two French counterfeiters had made thousands of genuine-looking notes - €50, €20, €10 - but they always wanted more. Scrambling through the discarded notes that had not passed scrutiny, they came upon a note that was completely perfect - except that it was for €18.
“Never mind” said the boss, “ We’ll unload it when we’re over in Ireland”
So, they took the note with them and, whilst in Cork, they entered a corner shop to get rid of the note.
‘Exccuse me’, said the boss to the shopkeeper O’Brien. “ Have you change for an €18 note?’
‘Indeed I have sor, said O’Brien, ‘‘Would you like three sixes or two nines?’