You are given a code:

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

Can you predict the output of `main_solution("wycdwgkcx")` 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": "wycdwgkcx"}, "ref_output": "w_y_c_d_w_g_k_c_x_m_p_a_j_x_l", "ref_code": "def main_solution(x):\n    return func_13((x + 'mpajxl'), '_')", "funcname": "main_solution"}
rule