You are given a code:

def main_solution(x):
    return func_20((x + 'pcv'), func_15('upq'))

Can you predict the output of `main_solution("wut")` 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": "wut"}, "ref_output": "w\u00abuut\u00bbp\u00abcpv\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'pcv'), func_15('upq'))", "funcname": "main_solution"}
rule