You are given a code:

def main_solution(x):
    return func_20(func_4(x), func_15('yue'))

Can you predict the output of `main_solution("zvmswkne")` 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": "zvmswkne"}, "ref_output": "z\u00abvym\u00bbs\u00abwuk\u00bbn\u00abee\u00bb", "ref_code": "def main_solution(x):\n    return func_20(func_4(x), func_15('yue'))", "funcname": "main_solution"}
rule