You are given a code:

def main_solution(x):
    return func_5('pqsqsg', 'qwhg')

Can you predict the output of `main_solution("xzstumi")` 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": "xzstumi"}, "ref_output": "qwhgpqsqsg", "ref_code": "def main_solution(x):\n    return func_5('pqsqsg', 'qwhg')", "funcname": "main_solution"}
rule