You are given a code:

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

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