You are given a code:

def main_solution(x):
    return func_20(func_15('csp'), func_20('xahc', 'exck'))

Can you predict the output of `main_solution("jjyvhkgkla")` 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": "jjyvhkgkla"}, "ref_output": "\u00abxce\u00bba\u00abxsh\u00bbc\u00abcpk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('csp'), func_20('xahc', 'exck'))", "funcname": "main_solution"}
rule