# Matrix Addition Program

# Read matrix dimensions
m, n = map(int, input().split())


if m <= 0 or n <= 0 or m > 100 or n > 100:
    print("Invalid input")
    exit()


matrix1 = []
for _ in range(m):
    row = list(map(int, input().split()))
    if len(row) != n:
        print("Invalid input")
        exit()
    matrix1.append(row)


matrix2 = []
for _ in range(m):
    row = list(map(int, input().split()))
    if len(row) != n:
        print("Invalid input")
        exit()
    matrix2.append(row)


result = []
for i in range(m):
    row = []
    for j in range(n):
        row.append(matrix1[i][j] + matrix2[i][j])
    result.append(row)


for row in result:
    print(" ".join(map(str, row)))