You are given a code:

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

Can you predict the output of `main_solution("radrltem")` 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": "radrltem"}, "ref_output": "drzafdrrltem\u00abv\u00bb\u00abo\u00bb\u00abo\u00bb\u00aby\u00bb\u00abw\u00bb", "ref_code": "def main_solution(x):\n    return (func_20('dzfr', x) + func_15('vooyw'))", "funcname": "main_solution"}
rule