You are given a code:

def main_solution(x):
    return func_20('ugkwvk', 'xwyx')

Can you predict the output of `main_solution("hfqriawwbd")` 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": "hfqriawwbd"}, "ref_output": "uxgwkywxvk", "ref_code": "def main_solution(x):\n    return func_20('ugkwvk', 'xwyx')", "funcname": "main_solution"}
rule