Sudanese/Russian Version of Abbott and Costello

Deng Deng came for tutoring again. It's his first and last name. The desk assistant (from a Russian background) asked for his last name. He said, 'I'm Deng.' She said, 'I'm sorry, what is your last name?' ...'Deng,' he said. 'No, your last name, not your first name,' she said. Again, he replied, 'Deng. It is Deng.' On and on it went. Sort of like a Sudanese/Russian version of Abbott and Costello 'Who's on First?' I couldn't stop laughing. ~7/1/09