You are given a code:

def main_solution(x):
    return func_20(func_13('vsbbno', '_'), func_15('wdh'))

Can you predict the output of `main_solution("diqhvocehq")` 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": "diqhvocehq"}, "ref_output": "v\u00ab_ws\u00bb_\u00abbd_\u00bbb\u00ab_hn\u00bb_o", "ref_code": "def main_solution(x):\n    return func_20(func_13('vsbbno', '_'), func_15('wdh'))", "funcname": "main_solution"}
rule