You are given a code:

def main_solution(x):
    return func_19('hnrd', 1)

Can you predict the output of `main_solution("pardau")` 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": "pardau"}, "ref_output": "nrdh", "ref_code": "def main_solution(x):\n    return func_19('hnrd', 1)", "funcname": "main_solution"}
rule