You are given a code:

def main_solution(x):
    return func_9(func_15('gspmpg'))

Can you predict the output of `main_solution("frglwxc")` 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": "frglwxc"}, "ref_output": "\u00abg\u00bb\u00abs\u00bb\u00abp\u00bb\u00abm\u00bb\u00abp\u00bb\u00abg\u00bb\u00bbg\u00ab\u00bbp\u00ab\u00bbm\u00ab\u00bbp\u00ab\u00bbs\u00ab\u00bbg\u00ab", "ref_code": "def main_solution(x):\n    return func_9(func_15('gspmpg'))", "funcname": "main_solution"}
rule