You are given a code:

def main_solution(x):
    return func_4('zfqiam')

Can you predict the output of `main_solution("geeobezj")` 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": "geeobezj"}, "ref_output": "zfqiam", "ref_code": "def main_solution(x):\n    return func_4('zfqiam')", "funcname": "main_solution"}
rule