You are given a code:

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

Can you predict the output of `main_solution("ahnmjx")` 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": "ahnmjx"}, "ref_output": "a\u00abhan\u00bbm\u00abjhx\u00bbf\u00abvnv\u00bbl\u00abqm\u00bb\u00abj\u00bb\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'fvvlq'), func_15(x))", "funcname": "main_solution"}
rule