You are given a code:

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

Can you predict the output of `main_solution("atrsftwa")` 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": "atrsftwa"}, "ref_output": "m\u00absny\u00bbk\u00abgjf\u00bba\u00abtqr\u00bbs\u00abfkt\u00bbwa", "ref_code": "def main_solution(x):\n    return func_20(('msykgf' + x), func_15('njqk'))", "funcname": "main_solution"}
rule