You are given a code:

def main_solution(x):
    return func_22(('zik' + 'puatxk'))

Can you predict the output of `main_solution("ywzvuamlws")` 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": "ywzvuamlws"}, "ref_output": "zikpuatx", "ref_code": "def main_solution(x):\n    return func_22(('zik' + 'puatxk'))", "funcname": "main_solution"}
rule