You are given a code:

def main_solution(x):
    return func_20(func_13(x, '-'), func_15('uug'))

Can you predict the output of `main_solution("lpgmduzoa")` 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": "lpgmduzoa"}, "ref_output": "l\u00ab-up\u00bb-\u00abgu-\u00bbm\u00ab-gd\u00bb-u-z-o-a", "ref_code": "def main_solution(x):\n    return func_20(func_13(x, '-'), func_15('uug'))", "funcname": "main_solution"}
rule