You are given a code:

def main_solution(x):
    return func_20(func_15(x), func_1('vjgkz', 3))

Can you predict the output of `main_solution("klgqfksdpl")` 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": "klgqfksdpl"}, "ref_output": "\u00abvkj\u00bbg\u00abklz\u00bbv\u00abjgg\u00bbk\u00abzqv\u00bbj\u00abgfk\u00bbz\u00abk\u00bb\u00abs\u00bb\u00abd\u00bb\u00abp\u00bb\u00abl\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15(x), func_1('vjgkz', 3))", "funcname": "main_solution"}
rule