Hello blazar, Read the question properly, OP has asked:

I can compare this manually with for loops, but i want to know, is there any module to perform this task.

Another think, Read the update part:

If @b = (b, c, d), it is also wrong, because here the order is correct with @a, but a is not there in @b, so it is error, ie it should check from the beginning of @a

Eventhen your reply is WRONG