You are given a code:

def main_solution(x):
    return func_20(func_20('erkxcl', 'hwuayi'), func_15('gpcwk'))

Can you predict the output of `main_solution("xmf")` 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": "xmf"}, "ref_output": "e\u00abhgr\u00bbw\u00abkpu\u00bbx\u00abacc\u00bby\u00ablwi\u00bb\u00abk\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_20('erkxcl', 'hwuayi'), func_15('gpcwk'))", "funcname": "main_solution"}
rule