You are given a code:

def main_solution(x):
    return func_20(func_15('bielhb'), ('hkypy' + 'dwgys'))

Can you predict the output of `main_solution("ldgf")` 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": "ldgf"}, "ref_output": "\u00abhbk\u00bby\u00abpiy\u00bbd\u00abweg\u00bby\u00absl\u00bb\u00abh\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('bielhb'), ('hkypy' + 'dwgys'))", "funcname": "main_solution"}
rule