You are given a code:

def main_solution(x):
    return (('qxbef' + 'fcc') + func_5(x, 'pk'))

Can you predict the output of `main_solution("grwrdqs")` 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": "grwrdqs"}, "ref_output": "qxbeffccpkgrwrdqs", "ref_code": "def main_solution(x):\n    return (('qxbef' + 'fcc') + func_5(x, 'pk'))", "funcname": "main_solution"}
rule