You are given a code:

def main_solution(x):
    return ('yfi' + 'hujkry')

Can you predict the output of `main_solution("ggytoooley")` 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": "ggytoooley"}, "ref_output": "yfihujkry", "ref_code": "def main_solution(x):\n    return ('yfi' + 'hujkry')", "funcname": "main_solution"}
rule