import java.util.Scanner;

public class IdenticalArrays {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String [] stringArray1 = scanner.nextLine().split(" ");
        String [] stringArray2 = scanner.nextLine().split(" ");

        int [] array1 = new int[stringArray1.length];
        int [] array2 = new int[stringArray2.length];

        int sumOf1stElements = 0;
        boolean areEqual = true;
        int diff = 0;

        for (int i = 0; i <array1.length; i++) {
            array1[i] = Integer.parseInt(stringArray1[i]);
        }
        for (int i = 0; i <array2.length; i++) {
            array2[i] = Integer.parseInt(stringArray2[i]);
            sumOf1stElements = array1[i] + array2[i];
        }
        for (int i = 0; i <array1.length; i++) {
            if (array1[i]!=array2[i]){
                diff = i;
                System.out.printf("Arrays are not identical. Found difference at %d index.", diff);
                areEqual = false;
                break;
            }
        } if (areEqual)  System.out.printf("Arrays are identical. Sum: %d", sumOf1stElements);
    }
}