You are given a code:

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

Can you predict the output of `main_solution("morfags")` 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": "morfags"}, "ref_output": "\u00abmyo\u00bbr\u00abfia\u00bbg\u00abskm\u00bbo\u00abrnf\u00bba\u00abgus\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_15('yiknu'), (x + x))", "funcname": "main_solution"}
rule