You are given a code:

def main_solution(x):
    return func_5(('llutb' + 'urzol'), 'txnq')

Can you predict the output of `main_solution("zays")` 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": "zays"}, "ref_output": "txnqllutburzol", "ref_code": "def main_solution(x):\n    return func_5(('llutb' + 'urzol'), 'txnq')", "funcname": "main_solution"}
rule