n, m = map(int, input().split()) a = [] for e in range(n): row = list(map(int, input().split())) a.append(row) b = [] for e in range(n): row = list(map(int, input().split())) b.append(row) c = [] for i in range(n): row = [] for j in range(m): row.append(a[i][j] + b[i][j]) c.append(row) for row in c: print(' '.join(map(str, row)))