You are given a code:

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

Can you predict the output of `main_solution("djxkz")` 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": "djxkz"}, "ref_output": "d\u00abdyj\u00bbj\u00abxkx\u00bbk\u00abkjz\u00bbz\u00abz\u00bb\u00abo\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, x), func_15('ykjzo'))", "funcname": "main_solution"}
rule