#include <stdio.h>

int main() {
    int a, b, c, d;
    int sum, avg;
    scanf("%d %d %d %d", &a, &b, &c, &d);
    sum = a + b + c +d;
    avg = sum / 4;
    printf("sum %d\n", sum);
    printf("avg %d\n", avg);
    return 0;
}