You are given a code:

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

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