英语翻译某人刻苦学习英语,终有小成.一日上街不慎与一老外相撞,忙说：I am sorry.老外应道：I am sorry

Mr.X learns English diligently and he thinks he's good at it to some extent.
One day, he accidentally bumped into a foreigner when he was on the street. He apologized, "i am sorry."
"I am sorry too." replied the foreigner.
Hearing that, Mr.X said: "I am sorry three."
The foreigner didn't understand him and asked: "What are you sorry for?"
He had no choice but answered: "I am sorry five."