一辆卡车违反交通规则，撞人后逃跑。现场有三人目击该事件，但都没有记住车号，只记下车号的一些特征。甲说：牌照的前两位数字是相同的；乙说：牌照的后两位数字是相同的，但与前两位不同；丙是数学家，他说：四位的车号刚好是一个整数的平方。请根据以上线索求出车号。-A truck is in violation of traffic rules and fled after a collision. There are three people witnessed the incident, but did not remember the car number, just remember the car number of some features. A said: the first two digits of the license are the same　B said: the two digits of the license is the same, but with the first two different　C is a mathematician, he said: four car number just an integer The square. Please find the vehicle number according to the above line.