You are given a code:

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

Can you predict the output of `main_solution("pknmaqpqai")` 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": "pknmaqpqai"}, "ref_output": "p\u00abkrn\u00bbm\u00abaeq\u00bbp\u00abqra\u00bbi\u00abpgk\u00bbnmaqpqai", "ref_code": "def main_solution(x):\n    return func_20((x + x), func_15('rerg'))", "funcname": "main_solution"}
rule