import java.util.*;
public class HelloWorld
{
public static void main(String[] args)
{
System.out.println("Hello world!");
}
}
import java.util.*;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello world!");
}
}
public class HelloWorld
{
public static void main(String[] args)
{
System.out.println("Hello world!");
}
}
import java.util.*;
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello world!");
}
}
