You are given a code:

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

Can you predict the output of `main_solution("jongqwd")` 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": "jongqwd"}, "ref_output": "\u00ab\u00abjg\u00bb\u00bb\u00ab\u00abol\u00bb\u00bb\u00ab\u00abnl\u00bb\u00bb\u00ab\u00abgv\u00bb\u00bb\u00abq\u00bb\u00abw\u00bb\u00abd\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_15('gllv'))", "funcname": "main_solution"}
rule