You are given a code:

def main_solution(x):
    return func_5((x + 'dcrx'), 'beft')

Can you predict the output of `main_solution("exz")` 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": "exz"}, "ref_output": "beftexzdcrx", "ref_code": "def main_solution(x):\n    return func_5((x + 'dcrx'), 'beft')", "funcname": "main_solution"}
rule