You are given a code:

def main_solution(x):
    return func_20(func_5('goim', 'xqf'), func_15('cxg'))

Can you predict the output of `main_solution("flennb")` 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": "flennb"}, "ref_output": "x\u00abqcf\u00bbg\u00aboxi\u00bbm\u00abg\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5('goim', 'xqf'), func_15('cxg'))", "funcname": "main_solution"}
rule