Given arrays A of shape (3, 1) and B of shape (1, 3), return their broadcasted sum as a (3, 3) array:

• iterate over matching elements one at a time
• do not rely on a single vectorized + expression

Input

A =
[[0]
 [1]
 [2]]
B = [[0 1 2]]

Output

[[0 1 2]
 [1 2 3]
 [2 3 4]]