You are given a code:

def main_solution(x):
    return func_20(func_13('bngso', '-'), ('pwn' + 'liycav'))

Can you predict the output of `main_solution("ounls")` 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": "ounls"}, "ref_output": "bp-wnn-lgi-ysc-aov", "ref_code": "def main_solution(x):\n    return func_20(func_13('bngso', '-'), ('pwn' + 'liycav'))", "funcname": "main_solution"}
rule