You are given a code:

def main_solution(x):
    return func_20(func_15('ggt'), func_15('yrhb'))

Can you predict the output of `main_solution("mwaeuywq")` 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": "mwaeuywq"}, "ref_output": "\u00ab\u00abgy\u00bb\u00bb\u00ab\u00abgr\u00bb\u00bb\u00ab\u00abth\u00bb\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ggt'), func_15('yrhb'))", "funcname": "main_solution"}
rule