You are given a code:

def main_solution(x):
    return func_5('soyogs', 'kboa')

Can you predict the output of `main_solution("yyf")` 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": "yyf"}, "ref_output": "kboasoyogs", "ref_code": "def main_solution(x):\n    return func_5('soyogs', 'kboa')", "funcname": "main_solution"}
rule