You are given a code:

def main_solution(x):
    return func_20(func_15('qgftvf'), func_20(x, 'eim'))

Can you predict the output of `main_solution("dcpf")` 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": "dcpf"}, "ref_output": "\u00abdqe\u00bbc\u00abigp\u00bbm\u00abff\u00bb\u00abt\u00bb\u00abv\u00bb\u00abf\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('qgftvf'), func_20(x, 'eim'))", "funcname": "main_solution"}
rule