#include <stdio.h>

const int N = 15;

int main()
{
	int a[N], sum = 0;
	for (int i = 0; i < N; i++)
	{
		scanf("%d", &a[i]);
		if (a[i] > 0 && a[i] < 10)
			sum += a[i];
	}
	printf("%d\n", sum);
	return 0;
}