You are given a code:

def main_solution(x):
    return func_20(func_15('iwlgx'), (x + 'jrrbg'))

Can you predict the output of `main_solution("ubirgtooa")` 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": "ubirgtooa"}, "ref_output": "\u00abuib\u00bbi\u00abrwg\u00bbt\u00abolo\u00bba\u00abjgr\u00bbr\u00abbxg\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('iwlgx'), (x + 'jrrbg'))", "funcname": "main_solution"}
rule