You are given a code:

def main_solution(x):
    return func_20(func_20(x, x), func_15('fsfh'))

Can you predict the output of `main_solution("jsklof")` 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": "jsklof"}, "ref_output": "j\u00abjfs\u00bbs\u00abksk\u00bbl\u00ablfo\u00bbo\u00abfhf\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, x), func_15('fsfh'))", "funcname": "main_solution"}
rule