import sys input_data = sys.stdin.read() lines = input_data.strip().split('\n') group_num = int(lines[0]) t = 0 line_num = 1 while t < group_num: dim = list(map(int,lines[line_num].split())) row, column = dim[0],dim[1] res = 0 for i in range(line_num+1, line_num+ row + 1): arr = list(map(int,lines[i].split())) for j in range(column): res += arr[j] print(res) line_num = line_num + row + 1 t += 1