You are given a code:

def main_solution(x):
    return ('nggia' + 'rejfrg')

Can you predict the output of `main_solution("gokrup")` 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": "gokrup"}, "ref_output": "nggiarejfrg", "ref_code": "def main_solution(x):\n    return ('nggia' + 'rejfrg')", "funcname": "main_solution"}
rule