You are given a code:

def main_solution(x):
    return func_13(func_5(x, 'ddxb'), '_')

Can you predict the output of `main_solution("baogo")` 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": "baogo"}, "ref_output": "d_d_x_b_b_a_o_g_o", "ref_code": "def main_solution(x):\n    return func_13(func_5(x, 'ddxb'), '_')", "funcname": "main_solution"}
rule