You are given a code:

def main_solution(x):
    return func_20(func_13('skqx', '-'), func_15('bsx'))

Can you predict the output of `main_solution("bagsu")` 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": "bagsu"}, "ref_output": "s\u00ab-bk\u00bb-\u00abqs-\u00bbx\u00abx\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_13('skqx', '-'), func_15('bsx'))", "funcname": "main_solution"}
rule