<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def lchop(string, prefix):
 """Removes a prefix from string :param string: String, possibly prefixed with prefix :param prefix: Prefix to remove from string :returns: string without the prefix """

    if string.startswith(prefix):
        return string[len(prefix):]
    return string