You are given a code:

def main_solution(x):
    return func_20(func_15('ubrjtm'), func_20('binrun', x))

Can you predict the output of `main_solution("vhjznya")` 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": "vhjznya"}, "ref_output": "\u00abbuv\u00bbi\u00abhbn\u00bbj\u00abrrz\u00bbu\u00abnjn\u00bby\u00abat\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ubrjtm'), func_20('binrun', x))", "funcname": "main_solution"}
rule