You are given a code:

def main_solution(x):
    return (func_5('oqw', 'soe') + func_20('mzvlnf', 'dnzq'))

Can you predict the output of `main_solution("shfx")` 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": "shfx"}, "ref_output": "soeoqwmdznvzlqnf", "ref_code": "def main_solution(x):\n    return (func_5('oqw', 'soe') + func_20('mzvlnf', 'dnzq'))", "funcname": "main_solution"}
rule