You are given a code:

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

Can you predict the output of `main_solution("vyzwleouk")` 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": "vyzwleouk"}, "ref_output": "\u00abviy\u00bbz\u00abwil\u00bbe\u00abotu\u00bbk\u00abvyy\u00bbz\u00abwml\u00bbeouk", "ref_code": "def main_solution(x):\n    return func_20(func_15('iitym'), (x + x))", "funcname": "main_solution"}
rule