You are given a code:

def main_solution(x):
    return func_13(func_5(x, 'lte'), '_')

Can you predict the output of `main_solution("adxjbjseo")` 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": "adxjbjseo"}, "ref_output": "l_t_e_a_d_x_j_b_j_s_e_o", "ref_code": "def main_solution(x):\n    return func_13(func_5(x, 'lte'), '_')", "funcname": "main_solution"}
rule