You are given a code:

def main_solution(x):
    return func_20(func_15('lhd'), func_13('hyztyu', '_'))

Can you predict the output of `main_solution("jehiulhdl")` 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": "jehiulhdl"}, "ref_output": "\u00abhl_\u00bby\u00ab_hz\u00bb_\u00abtd_\u00bby_u", "ref_code": "def main_solution(x):\n    return func_20(func_15('lhd'), func_13('hyztyu', '_'))", "funcname": "main_solution"}
rule