You are given a code:

def main_solution(x):
    return ('ygbzat' + 'gbc')

Can you predict the output of `main_solution("saifjo")` 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": "saifjo"}, "ref_output": "ygbzatgbc", "ref_code": "def main_solution(x):\n    return ('ygbzat' + 'gbc')", "funcname": "main_solution"}
rule