You are given a code:

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

Can you predict the output of `main_solution("fgrgjhdhhw")` 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": "fgrgjhdhhw"}, "ref_output": "v\u00abjfg\u00bbi\u00abfgg\u00bbr\u00abgrj\u00bbh\u00abdgh\u00bbh\u00abwj\u00bb\u00abh\u00bb\u00abd\u00bb\u00abh\u00bb\u00abh\u00bb\u00abw\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('vjgi' + x), func_15(x))", "funcname": "main_solution"}
rule