You are given a code:

def main_solution(x):
    return ('wtydnm' + 'epatj')

Can you predict the output of `main_solution("lxemsp")` 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": "lxemsp"}, "ref_output": "wtydnmepatj", "ref_code": "def main_solution(x):\n    return ('wtydnm' + 'epatj')", "funcname": "main_solution"}
rule