You are given a code:

def main_solution(x):
    return func_20(('xwo' + 'rtwdp'), func_15('eqch'))

Can you predict the output of `main_solution("zrqke")` 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": "zrqke"}, "ref_output": "x\u00abweo\u00bbr\u00abtqw\u00bbd\u00abpc\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('xwo' + 'rtwdp'), func_15('eqch'))", "funcname": "main_solution"}
rule