You are given a code:

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

Can you predict the output of `main_solution("aefga")` 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": "aefga"}, "ref_output": "s_c_n_b_j_baefgaqlp", "ref_code": "def main_solution(x):\n    return (func_13('scnbjb', '_') + (x + 'qlp'))", "funcname": "main_solution"}
rule