You are given a code:

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

Can you predict the output of `main_solution("sspyjv")` 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": "sspyjv"}, "ref_output": "s\u00abswp\u00bby\u00abjov\u00bbt\u00abbtt\u00bbs\u00abjrk\u00bb\u00aba\u00bb\u00aba\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + 'tbtsjk'), func_15('wotraa'))", "funcname": "main_solution"}
rule