You are given a code:

def main_solution(x):
    return func_20(('xxusl').capitalize(), func_15('tiwgyz'))

Can you predict the output of `main_solution("mwqc")` 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": "mwqc"}, "ref_output": "X\u00abxtu\u00bbs\u00abli\u00bb\u00abw\u00bb\u00abg\u00bb\u00aby\u00bb\u00abz\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('xxusl').capitalize(), func_15('tiwgyz'))", "funcname": "main_solution"}
rule