You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'fj'), func_15('piwpt'))

Can you predict the output of `main_solution("jfsckpkfuj")` 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": "jfsckpkfuj"}, "ref_output": "f\u00abjpj\u00bbf\u00absic\u00bbk\u00abpwk\u00bbf\u00abupj\u00bb\u00abt\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'fj'), func_15('piwpt'))", "funcname": "main_solution"}
rule