ProgMasters 10 - Mix together

import java.util.*;

public class Main {
	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);


     String string1 = scanner.nextLine();

     String string2 = scanner.nextLine();


 if (string1.length()>string2.length()) {

    String newString = "";
    int i = 0;
    while (i<string2.length()){
        newString =string2.substring(i, i+1)+string1.substring(i, i+1);

        System.out.print(newString);
        i++;
    }

    System.out.print(string1.substring(i));

 }

 else {
    String newString = "";
    int i = 0;
    while (i<string1.length()){
        newString = string2.substring(i, i+1)+string1.substring(i, i+1);

        System.out.print(newString);
        i++;
    }

    System.out.print(string2.substring(i));

 }
     scanner.close();


	}
}