import java.util.ArrayList;


public class StringT {


    public static void main(String[] args) {

        // alpha would represent fetchContactNames()
        ArrayList<String> alpha = new ArrayList<String>();
        // bravo would represent fetchContactNumbers()
        ArrayList<String> bravo = new ArrayList<String>();
        // charlie would represent newList
        ArrayList<String> charlie = new ArrayList<String>();

        alpha.add("One");    bravo.add("1"); charlie.add("5");
        alpha.add("Two");    bravo.add("2"); charlie.add("2");
        alpha.add("Three");  bravo.add("3"); charlie.add("7");
        alpha.add("Four");   bravo.add("4"); charlie.add("3");
        alpha.add("Five");   bravo.add("5");
        alpha.add("Six");    bravo.add("6");
        alpha.add("Seven");  bravo.add("7");

        // this will print charlie just as you see above
        for(int i = 0; i < charlie.size(); i ++){
            System.out.println(charlie.get(i));
        }

        System.out.println("---------------------");

        // this will print charlie with the numbers replaced as names
        for(int i = 0; i < charlie.size(); i++){
            int index = bravo.indexOf(charlie.get(i));
            if(bravo.contains(charlie.get(i))){
                charlie.set(i, alpha.get(index));
            }
        }

        for(int i = 0; i < charlie.size(); i ++){
            System.out.println(charlie.get(i));
        }
    }
}