You are given a code:

def main_solution(x):
    return func_20(func_5(x, 'ul'), func_15('gaih'))

Can you predict the output of `main_solution("klfccu")` 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": "klfccu"}, "ref_output": "u\u00ablgk\u00bbl\u00abfac\u00bbc\u00abui\u00bb\u00abh\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_5(x, 'ul'), func_15('gaih'))", "funcname": "main_solution"}
rule