You are given a code:

def main_solution(x):
    return (func_13('otcvu', '-') + func_17('zbhwnn'))

Can you predict the output of `main_solution("agiyenc")` 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": "agiyenc"}, "ref_output": "o-t-c-v-unnwhbz", "ref_code": "def main_solution(x):\n    return (func_13('otcvu', '-') + func_17('zbhwnn'))", "funcname": "main_solution"}
rule