英语奥赛试题You drove a bus with 10 people on it and wet long the

英语奥赛试题
You drove a bus with 10 people on it and wet long the street.At the first stop,seven people got on,but three got off;at the second stop,four people got on and seven got off;at the third stop,eight people got on and nobody got off;at the fourth stop,three people got on while only one person got off,
Question:What is the name of the driver?