You are given a code:

def main_solution(x):
    return func_5(('vhpou' + 'xkik'), 'sia')

Can you predict the output of `main_solution("tlnbglhc")` 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": "tlnbglhc"}, "ref_output": "siavhpouxkik", "ref_code": "def main_solution(x):\n    return func_5(('vhpou' + 'xkik'), 'sia')", "funcname": "main_solution"}
rule