You are given a code:

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

Can you predict the output of `main_solution("spjgfw")` 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": "spjgfw"}, "ref_output": "\u00absap\u00bbj\u00abgzf\u00bbw\u00abvfu\u00bbd\u00abssz\u00bba", "ref_code": "def main_solution(x):\n    return func_20(func_15('azfs'), (x + 'vudsza'))", "funcname": "main_solution"}
rule