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import java.io.*;
class StringXXXX
{
public static void main(String a[])
{
String str1=new String("Hello");
StringBuffer str2=new StringBuffer("Hello");
StringBuilder str3=new StringBuilder("Hello");
System.out.println(str1);
System.out.println(str1.length());
System.out.println(str2);
System.out.println(str2.length());
System.out.println(str3);
System.out.println(str3.length());
}
}