import java.util.Scanner;

// 注意類名必須為 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int t = in.nextInt();
        for(int k = 0; k < t; k++){
            long kSum = 0;
            short n = in.nextShort();
            short m = in.nextShort();
            for(short i = 0; i < n; i++){
                for(short j = 0; j < m; j++){
                    kSum += in.nextInt();
                }
            }
            System.out.println(kSum);
        }
        in.close();
    }
}