You are given a code:

def main_solution(x):
    return func_4(('esdwg' + 'wet'))

Can you predict the output of `main_solution("nxes")` 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": "nxes"}, "ref_output": "esdwgwet", "ref_code": "def main_solution(x):\n    return func_4(('esdwg' + 'wet'))", "funcname": "main_solution"}
rule