m,n=map(int,input().split())
if m<=0 or n<=0:
print("Invalid input")
exit()
matrix1=[list(map(int,input().split()))for_in range(m)]
matrix2=[list(map(int,input().split()))for_in range(m)]
if any(len(row)!=n for now in matrix1)or any(len(row)!=n for row in matrix2):
print("Invalid input")
exit()
for i in range(m):
result=[matrix1[i][j]+matrix2[i][j] for j in range(n)]
print(*result)