You are given a code:

def main_solution(x):
    return func_11(func_5('fkg', 'hr'), 4)

Can you predict the output of `main_solution("vophxcyirl")` 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": "vophxcyirl"}, "ref_output": "lvjok", "ref_code": "def main_solution(x):\n    return func_11(func_5('fkg', 'hr'), 4)", "funcname": "main_solution"}
rule