You are given a code:

def main_solution(x):
    return func_20(func_15('ixrj'), func_1('jcw', 2))

Can you predict the output of `main_solution("ccpmfeppop")` 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": "ccpmfeppop"}, "ref_output": "\u00abjic\u00bbw\u00abjxc\u00bbw\u00abr\u00bb\u00abj\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('ixrj'), func_1('jcw', 2))", "funcname": "main_solution"}
rule