You are given a code:

def main_solution(x):
    return func_20(func_15('efxlrk'), func_1(x, 4))

Can you predict the output of `main_solution("ciggr")` 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": "ciggr"}, "ref_output": "\u00abcei\u00bbg\u00abgfr\u00bbc\u00abixg\u00bbg\u00abrlc\u00bbi\u00abgrg\u00bbr\u00abcki\u00bbggr", "ref_code": "def main_solution(x):\n    return func_20(func_15('efxlrk'), func_1(x, 4))", "funcname": "main_solution"}
rule