You are given a code:

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

Can you predict the output of `main_solution("bkudgza")` 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": "bkudgza"}, "ref_output": "f\u00abkbs\u00bby\u00abbkk\u00bbu\u00abdug\u00bbz\u00abad\u00bb\u00abg\u00bb\u00abz\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('fksy' + x), func_15(x))", "funcname": "main_solution"}
rule