You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_20(x, 'atmkds'))

Can you predict the output of `main_solution("ewpjqbipwd")` 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": "ewpjqbipwd"}, "ref_output": "\u00abeea\u00bbw\u00abtwp\u00bbm\u00abjpk\u00bbq\u00abdjb\u00bbs\u00abiqp\u00bbw\u00abdb\u00bb\u00abi\u00bb\u00abp\u00bb\u00abw\u00bb\u00abd\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_20(x, 'atmkds'))", "funcname": "main_solution"}
rule