You are given a code:

def main_solution(x):
    return func_20(func_15('vkf'), func_20('jeugay', x))

Can you predict the output of `main_solution("ernkjqck")` 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": "ernkjqck"}, "ref_output": "\u00abjve\u00bbe\u00abrku\u00bbn\u00abgfk\u00bbajyqck", "ref_code": "def main_solution(x):\n    return func_20(func_15('vkf'), func_20('jeugay', x))", "funcname": "main_solution"}
rule