You are given a code:

def main_solution(x):
    return func_13(func_20('xhtave', x), '_')

Can you predict the output of `main_solution("sdaecpd")` 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": "sdaecpd"}, "ref_output": "x_s_h_d_t_a_a_e_v_c_e_p_d", "ref_code": "def main_solution(x):\n    return func_13(func_20('xhtave', x), '_')", "funcname": "main_solution"}
rule