Predetermined characters

Question

I wish to know is there any code in C# to pick up predetermined characters from random input.

Suppose we say predetermined characters are "Address"

Random console input is 3545325Adggfdgdfgd3!@$@@#rsfssefas&*acs.

Program will realise there are A, d, d, r, e, s, and s letters in it and pick up and return it.