You are given a code:

def main_solution(x):
    return func_9(func_13('ljbawf', '_'))

Can you predict the output of `main_solution("dmbrjjt")` 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": "dmbrjjt"}, "ref_output": "l_j_b_a_w_ff_w_a_b_j_l", "ref_code": "def main_solution(x):\n    return func_9(func_13('ljbawf', '_'))", "funcname": "main_solution"}
rule