You are given a code:

def main_solution(x):
    return ('mhli' + 'dmjb')

Can you predict the output of `main_solution("xelzkh")` 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": "xelzkh"}, "ref_output": "mhlidmjb", "ref_code": "def main_solution(x):\n    return ('mhli' + 'dmjb')", "funcname": "main_solution"}
rule