You are given a code:

def main_solution(x):
    return func_5(func_5('aaslut', 'axvz'), 'mbq')

Can you predict the output of `main_solution("npghn")` 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": "npghn"}, "ref_output": "mbqaxvzaaslut", "ref_code": "def main_solution(x):\n    return func_5(func_5('aaslut', 'axvz'), 'mbq')", "funcname": "main_solution"}
rule