You are given a code:

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

Can you predict the output of `main_solution("dlszpptric")` 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": "dlszpptric"}, "ref_output": "a_h_k_e_i_f_y_k_z", "ref_code": "def main_solution(x):\n    return func_13(func_20('akiykz', 'hef'), '_')", "funcname": "main_solution"}
rule