You are given a code:

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

Can you predict the output of `main_solution("cfkqczd")` 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": "cfkqczd"}, "ref_output": "c\u00abflk\u00bbq\u00abcgz\u00bbd\u00abcdf\u00bbk\u00abqpc\u00bbz\u00abdx\u00bb\u00abs\u00bb", "ref_code": "def main_solution(x):\n    return func_20((x + x), func_15('lgdpxs'))", "funcname": "main_solution"}
rule