You are given a code:

def main_solution(x):
    return func_20(func_15('llvpa'), func_5(x, 'bakj'))

Can you predict the output of `main_solution("mxqrfsjag")` 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": "mxqrfsjag"}, "ref_output": "\u00abbla\u00bbk\u00abjlm\u00bbx\u00abqvr\u00bbf\u00abspj\u00bba\u00abga\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('llvpa'), func_5(x, 'bakj'))", "funcname": "main_solution"}
rule