You are given a code:

def main_solution(x):
    return func_5(func_22('zqrjb'), 'pd')

Can you predict the output of `main_solution("olndo")` 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": "olndo"}, "ref_output": "pdzqrj", "ref_code": "def main_solution(x):\n    return func_5(func_22('zqrjb'), 'pd')", "funcname": "main_solution"}
rule