You are given a code:

def main_solution(x):
    return func_4('nlpqf')

Can you predict the output of `main_solution("naongmy")` 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": "naongmy"}, "ref_output": "nlpqf", "ref_code": "def main_solution(x):\n    return func_4('nlpqf')", "funcname": "main_solution"}
rule