strReplace not working more than once

[Ipquarx]

I'm trying to make a script that takes a input, and replaces certain characters, and then returns the finished string. This involves more than 1 strreplace, but it's not seeming to work more than once. I've tried using separate functions, using different variable names, but it only seems to replace once.
Here's the code:

function NN(%Input)
{
    strreplace(%Input, ".", " ");
    strreplace(%input, "e", " ");
}

How do i fix this?
Replies appreciated!

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[Iban]

function thinkClearly(%string)
{
   %string = strreplace(%string, "herp", "Thinking");
   %string = strreplace(%string, "derp", "Clearly");
   return %string;   
}

Does this:

==> echo(thinkClearly("I am herp derp."));
I am Thinking Clearly.

[Ipquarx]

*facepalm* thats what the problem was, i forgot to put %string =
thanks, locking topic.