You are given a code:

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

Can you predict the output of `main_solution("rbwpspis")` 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": "rbwpspis"}, "ref_output": "u\u00ablrs\u00bbq\u00abobh\u00bbn\u00abw\u00bb\u00abp\u00bb\u00abs\u00bb\u00abp\u00bb\u00abi\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20(('uls' + 'qohn'), func_15(x))", "funcname": "main_solution"}
rule