examples/files/a.txt
Tomato=78
Avocado=23
Pumpkin=100
examples/files/b.txt
Cucumber=17
Avocado=10
Cucumber=10

Write a script that takes the two files and combines them adding the values for each vegetable. The expected result is:

examples/files/c.txt
Avocado=33
Cucumber=27
Pumpkin=100
Tomato=78