# Write a Python program to add two given lists of different lengths, start from left , using itertools module.  
 from itertools import zip_longest

def elementswise_left_join(l1, l2):
    result = [a + b for a,b in zip_longest(l1, l2, fillvalue=0)][::1]
    return result

nums1 = [2, 4, 7, 0, 5, 8]
nums2 = [3, 3, -1, 7]
print("\nOriginal lists:")
print(nums1)
print(nums2)
print("\nAdd said two lists from left:")
print(elementswise_left_join(nums1, nums2))

nums3 = [1, 2, 3, 4, 5, 6]
nums4 = [2, 4, -3]
print("\nOriginal lists:")
print(nums3)
print(nums4)
print("\nAdd said two lists from left:")
print(elementswise_left_join(nums3, nums4))
