You are given a code:

def main_solution(x):
    return func_22(func_15('schxu'))

Can you predict the output of `main_solution("pfg")` 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": "pfg"}, "ref_output": "\u00abs\u00bb\u00abc\u00bb\u00abh\u00bb\u00abx\u00bb\u00abu", "ref_code": "def main_solution(x):\n    return func_22(func_15('schxu'))", "funcname": "main_solution"}
rule