You are given a code:

def main_solution(x):
    return func_20(func_1('lurr', 4), func_15(x))

Can you predict the output of `main_solution("hafdlrhnuq")` 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": "hafdlrhnuq"}, "ref_output": "l\u00abuhr\u00bbr\u00ablau\u00bbr\u00abrfl\u00bbu\u00abrdr\u00bbl\u00abulr\u00bbr\u00abr\u00bb\u00abh\u00bb\u00abn\u00bb\u00abu\u00bb\u00abq\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_1('lurr', 4), func_15(x))", "funcname": "main_solution"}
rule