You are given a code:

def main_solution(x):
    return func_20(func_15('ulq'), func_20(x, 'fatzsd'))

Can you predict the output of `main_solution("zigi")` 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": "zigi"}, "ref_output": "\u00abzuf\u00bbi\u00abalg\u00bbt\u00abiqz\u00bbsd", "ref_code": "def main_solution(x):\n    return func_20(func_15('ulq'), func_20(x, 'fatzsd'))", "funcname": "main_solution"}
rule