You are given a code:

def main_solution(x):
    return (func_13('aizeqw', '-') + func_13(x, '_'))

Can you predict the output of `main_solution("ddgsxddyft")` 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": "ddgsxddyft"}, "ref_output": "a-i-z-e-q-wd_d_g_s_x_d_d_y_f_t", "ref_code": "def main_solution(x):\n    return (func_13('aizeqw', '-') + func_13(x, '_'))", "funcname": "main_solution"}
rule