You are given a code:

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

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