Please use Python 2.7, and use TWO WHILE LOOPS(nested) for this problem. Please do NOT use a "For" loop. The problem, the answer template, and the test cases it MUST pass are provided below in that order.

Problem:

Write code that takes a string and a substring from the user, and removes all instances of the substring, returning that new resultant string. You may not use any built-in functions/methods besides len() and .append(). Specifically, you may NOT use the replace() method.

Here is the Answer Template:

def remove(string, sub): string = string sub = sub #YOUR CODE GOES HERE (indented) return [] #END YOUR CODE

And finally, the Test Cases it must pass!

remove happyhappycatbihapytr hap pypycatbiytr remove happyhappycatbihpytr hap pypycatbihpytr remove happyhappycatbihxaxpytr hap pypycatbihxaxpytr remove bird i brd remove happybirthday ppybir hathday