import java.util.Scanner;
import java.util.Arrays;

public class HelloWorld{

    public static void main(String []args){

        int[] array = new int[12];
        int sum = 0;

        Scanner input = new Scanner(System.in);

        for(int i = 1; i <= 6; i++)
        {
            String line = input.nextLine();
            String[] numbers = line.split(" ");

            for(int x= 0; x < numbers.length; x++) {
            array[i] = Integer.parseInt(numbers[x]);
            }
            }

        for(int i = 0; i < array.length ; i++)
        sum = sum + array[i];
        double average = sum / array.length;

        System.out.println("Avg: " + average);

    }

}