#include <stdio.h>

int main() {
    int m, n;
    
    if (scanf("%d", &m, &n) !=2 || m <=0 || n <= 0 || m > 10 || n > 10) {
        printf("Invalid input");
        return 0;
    }
    
    int arr[10][10];
    int sum = 0;
    
    for (int i = 0; i < m; i++){
        for (int j = 0; j < n; j++) {
            if (scanf("%d", &arr[i][j]) !=1) {
                printf("Invalid input");
                return 0;
            }
            
            sum += arr[i][j];
        }
    }
    
    printf()