You are given a code:

def main_solution(x):
    return func_5(func_5('ulbcm', 'xxq'), 'pv')

Can you predict the output of `main_solution("hiiey")` 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": "hiiey"}, "ref_output": "pvxxqulbcm", "ref_code": "def main_solution(x):\n    return func_5(func_5('ulbcm', 'xxq'), 'pv')", "funcname": "main_solution"}
rule