You are given a code:

def main_solution(x):
    return func_5(func_15('wrm'), 'efzm')

Can you predict the output of `main_solution("ysurmcf")` 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": "ysurmcf"}, "ref_output": "efzm\u00abw\u00bb\u00abr\u00bb\u00abm\u00bb", "ref_code": "def main_solution(x):\n    return func_5(func_15('wrm'), 'efzm')", "funcname": "main_solution"}
rule