If you can assume that you are given a valid fizzbuzz sequence then your solution works. However, look at what it outputs for: raw_input = ["Fizz","Buzz","Fizz

If you can assume that you are given a valid fizzbuzz sequence then your solution works. However, look at what it outputs for: raw_input = ["Fizz","Buzz","Fizz","Fizz","Buzz","Fizz","FizzBuzz","Buzz","Buzz"]