Exercise for reference: 

letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]

Answer: 

letters = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]
print(letters[1])

Explanation: 

Every item of a list is referenced to an index number starting from zero and increasing by one. Such a hidden index system is used to access list items. Therefore, we accessed item b using an index of 1.