You are given a code:

def main_solution(x):
    return func_20(func_20(x, x), func_15('ccziln'))

Can you predict the output of `main_solution("ocidfj")` 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": "ocidfj"}, "ref_output": "o\u00abocc\u00bbc\u00abici\u00bbd\u00abdzf\u00bbf\u00abjij\u00bb\u00abl\u00bb\u00abn\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20(x, x), func_15('ccziln'))", "funcname": "main_solution"}
rule