public class concatena{

    public static String concatena1(String s1, String s2){
	return s1.substring(0,1) + s2.substring(0,1);
    }

    public static String concatena2(String s1, String s2){
	return s1.substring(0,3) + s2.substring(s2.length()-3,s2.length());
    }

    public static void main(String[] args){
	System.out.println("Stringhe in Ingresso = Alessandro Farinelli");
	System.out.println(concatena1("Alessandro","Farinelli"));
	System.out.println(concatena2("Alessandro","Farinelli"));
    }

}