You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.

Sentence: 'a hot dog in a bun with ketchup on a plate with french fries'. How many words start with the letter 'a' in the sentence.
Solution: 3
Why? The word 'a' is the only word that starts with 'a'. This sentence has 3 occurrences of the word 'a'. So, the answer is 3.

New input: Sentence: 'a city with sky scrapers and cars on it'. How many words start with the letter 'a' in the sentence.
Solution:
2