You are given a code:

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

Can you predict the output of `main_solution("wxxgguoj")` 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": "wxxgguoj"}, "ref_output": "\u00abnwy\u00bbh\u00abnxw\u00bbx\u00abxxg\u00bbg\u00abugo\u00bbj\u00abg\u00bb\u00abu\u00bb\u00abo\u00bb\u00abj\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), ('nyhn' + x))", "funcname": "main_solution"}
rule