import java.util.Scanner;

class SumTall {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int sum = 0;

		while (true) {
			int num = s.nextInt();

			//Exit the loop if the user inputs 0
			if (num == 0)
				break;

			sum += num;
		}

		//After the user input 0, show them the sum of all their inputs
		System.out.println("Sum: "+sum);
	}
}