You are given a code:

def main_solution(x):
    return func_20(('spuxps' + x), func_15(x))

Can you predict the output of `main_solution("dkgpoulsb")` 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": "dkgpoulsb"}, "ref_output": "s\u00abpdu\u00bbx\u00abpks\u00bbd\u00abkgg\u00bbp\u00abopu\u00bbl\u00absob\u00bb\u00abu\u00bb\u00abl\u00bb\u00abs\u00bb\u00abb\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('spuxps' + x), func_15(x))", "funcname": "main_solution"}
rule