You are given a code:

def main_solution(x):
    return func_20(func_15('gce'), func_13('embpdd', '-'))

Can you predict the output of `main_solution("hckbxc")` 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": "hckbxc"}, "ref_output": "\u00abeg-\u00bbm\u00ab-cb\u00bb-\u00abpe-\u00bbd-d", "ref_code": "def main_solution(x):\n    return func_20(func_15('gce'), func_13('embpdd', '-'))", "funcname": "main_solution"}
rule