You are given a code:

def main_solution(x):
    return (func_15('jum') + func_13('kbzbj', '-'))

Can you predict the output of `main_solution("fdyocuzwb")` 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": "fdyocuzwb"}, "ref_output": "\u00abj\u00bb\u00abu\u00bb\u00abm\u00bbk-b-z-b-j", "ref_code": "def main_solution(x):\n    return (func_15('jum') + func_13('kbzbj', '-'))", "funcname": "main_solution"}
rule