You are given a code:

def main_solution(x):
    return func_9(func_13('ormukc', '_'))

Can you predict the output of `main_solution("lbl")` 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": "lbl"}, "ref_output": "o_r_m_u_k_cc_k_u_m_r_o", "ref_code": "def main_solution(x):\n    return func_9(func_13('ormukc', '_'))", "funcname": "main_solution"}
rule