You are given a code:

def main_solution(x):
    return func_20(func_13('bfwuen', '-'), func_5('rtqwex', 'igu'))

Can you predict the output of `main_solution("cexkddkf")` 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": "cexkddkf"}, "ref_output": "bi-gfu-rwt-quw-eex-n", "ref_code": "def main_solution(x):\n    return func_20(func_13('bfwuen', '-'), func_5('rtqwex', 'igu'))", "funcname": "main_solution"}
rule