You are given a code:

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

Can you predict the output of `main_solution("ozkynhuasu")` 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": "ozkynhuasu"}, "ref_output": "o\u00abzmk\u00bby\u00abnnh\u00bbu\u00abads\u00bbuozkynhuasuozkynhuasuozkynhuasu", "ref_code": "def main_solution(x):\n    return func_20(func_1(x, 4), func_15('mnd'))", "funcname": "main_solution"}
rule