You are given a code:

def main_solution(x):
    return func_20(func_11(x, 1), func_15('bbry'))

Can you predict the output of `main_solution("nexvsrqgmn")` 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": "nexvsrqgmn"}, "ref_output": "o\u00abfby\u00bbw\u00abtbs\u00bbr\u00abhrn\u00bbo\u00aby\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_11(x, 1), func_15('bbry'))", "funcname": "main_solution"}
rule