# Write a NumPy program to build an array of all combinations of three NumPy arrays.  
 import numpy as np
x = [1, 2, 3]
y = [4, 5]
z = [6, 7]
print("Original arrays:")
print("Array-1")
print(x)
print("Array-2")
print(y)
print("Array-3")
print(z)
new_array = np.array(np.meshgrid(x, y, z)).T.reshape(-1,3)
print("Combine array:")
print(new_array)
