You are given a code:

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

Can you predict the output of `main_solution("izfmc")` 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": "izfmc"}, "ref_output": "i\u00abzgf\u00bbm\u00abcri\u00bbz\u00abfnm\u00bbc\u00abv\u00bb\u00abn\u00bb\u00abd\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + x), func_15('grnvnd'))", "funcname": "main_solution"}
rule