You are given a code:

def main_solution(x):
    return func_20(func_19(x, 1), func_15('kwtwl'))

Can you predict the output of `main_solution("kqnuyk")` 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": "kqnuyk"}, "ref_output": "q\u00abnku\u00bby\u00abkwk\u00bb\u00abt\u00bb\u00abw\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_19(x, 1), func_15('kwtwl'))", "funcname": "main_solution"}
rule