You are given a code:

def main_solution(x):
    return (func_15('joexee') + func_13('vcs', '_'))

Can you predict the output of `main_solution("ugnrsedvh")` 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": "ugnrsedvh"}, "ref_output": "\u00abj\u00bb\u00abo\u00bb\u00abe\u00bb\u00abx\u00bb\u00abe\u00bb\u00abe\u00bbv_c_s", "ref_code": "def main_solution(x):\n    return (func_15('joexee') + func_13('vcs', '_'))", "funcname": "main_solution"}
rule