You are given a code:

def main_solution(x):
    return func_20(('hkjck' + 'npo'), ('uifqb' + 'dszjp'))

Can you predict the output of `main_solution("xgmxzkmybe")` 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": "xgmxzkmybe"}, "ref_output": "hukijfcqkbndpsozjp", "ref_code": "def main_solution(x):\n    return func_20(('hkjck' + 'npo'), ('uifqb' + 'dszjp'))", "funcname": "main_solution"}
rule