某地刑侦大队对涉及六个嫌疑人的一桩疑案进行分析：

A、B 至少有一人作案；

A、E、F 三人中至少有两人参与作案；

A、D 不可能是同案犯；

B、C 或同时作案，或与本案无关；

C、D 中有且仅有一人作案；

如果 D 没有参与作案，则 E 也不可能参与作案。

试编一程序，将作案人找出来。

-Doubtful Case of a six suspects involved somewhere Criminal Investigation Brigade: A, B is at least one person committing the crime , A, E, F three at least two people were involved in committing the crime can not be accomplice　A, D　B C or committing the crime at the same time, or nothing to do with the case　C, D, and only one person committing the crime　if D is not involved in committing the crime, then E can not be involved in crime. Try to compile a program, find out the perpetrators.