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 public class Test {
public static void main(String args[]){
try{
// »ñÈ¡¼üÅÌÊäÈëµÄ×Ö·û´®
BufferReader  f =  new BufferReader(new inputStreamReader(System.in));
String str = f.readline();
for (int i = str.length() -1 ; i >=0 ; i--) {
System.out.print(CharAt(i));
}
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String string = new StringBuilder(str).reverse().toString();
System.out.println(String);
}catch(Exception e){
e.printStacck();
}
}
}


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