You are given a code:

def main_solution(x):
    return func_20(func_20(x, 'uptlxd'), func_15(x))

Can you predict the output of `main_solution("gwlvyqjmru")` without writing any code? Please reason and put your final answer in the following json format: {"output": <your output>}, where <your output> should be the final string.
user
{"ref_input": {"x": "gwlvyqjmru"}, "ref_output": "g\u00abugw\u00bbp\u00ablwt\u00bbv\u00ablly\u00bbx\u00abqvd\u00bbj\u00abmyr\u00bbu\u00abq\u00bb\u00abj\u00bb\u00abm\u00bb\u00abr\u00bb\u00abu\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, 'uptlxd'), func_15(x))", "funcname": "main_solution"}
rule