You are given a code:

def main_solution(x):
    return func_20(('vbcqeb' + x), func_15('niqli'))

Can you predict the output of `main_solution("egdniej")` 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": "egdniej"}, "ref_output": "v\u00abbnc\u00bbq\u00abeib\u00bbe\u00abgqd\u00bbn\u00abile\u00bbj\u00abi\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('vbcqeb' + x), func_15('niqli'))", "funcname": "main_solution"}
rule