# Import the add function from the operator module
from operator import add
# Define the lambda function
element_wise_sum = lambda x, y: list(map(add, x, y))
# Test the function
print(element_wise_sum([1, 2, 3], [4, 5, 6])) # Output: [5, 7, 9]
print(element_wise_sum([7, 8, 9], [1, 2, 3])) # Output: [8, 10, 12]