You are given a code:

def main_solution(x):
    return ('onc' + 'hxix')

Can you predict the output of `main_solution("nskzl")` 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": "nskzl"}, "ref_output": "onchxix", "ref_code": "def main_solution(x):\n    return ('onc' + 'hxix')", "funcname": "main_solution"}
rule