slicing

matrix =  np.random.randint(0, 10, size=(5, 9, 15))
print("matrix")
print(matrix)
for i in range(2):
    for j in range(3):
        for k in range(7):
            print("i j k", i, j, k)
            print("matrix[i: i + 3, j: j + 2, k]")
            print(matrix[i: i + 3, j: j + 2, k])
            print()