
'''

The complete syntax of list slicing is [start:end:step] .
When you don't pass a step, Python assumes the step is 1. [:]
itself means get everything from start to end.
So, [::2]  means get everything from start to end at a
step of two.

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

print(letters[::2])