You are given a code:

def main_solution(x):
    return ('zewftu' + 'jpkp')

Can you predict the output of `main_solution("hralrrkc")` 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": "hralrrkc"}, "ref_output": "zewftujpkp", "ref_code": "def main_solution(x):\n    return ('zewftu' + 'jpkp')", "funcname": "main_solution"}
rule