You are given a code:

def main_solution(x):
    return func_20('vshfm', 'waf')

Can you predict the output of `main_solution("yeqguohdk")` 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": "yeqguohdk"}, "ref_output": "vwsahffm", "ref_code": "def main_solution(x):\n    return func_20('vshfm', 'waf')", "funcname": "main_solution"}
rule