Teacher: In this task, you need to count the number of words in a sentence that contain the given letter
Teacher: Now, understand the problem? If you are still confused, see the following example:
Sentence: 'two gray birds standing in a green field'. How many words contain the letter 'a' in the sentence.
Solution: 3
Reason: The words 'gray', 'standing', and 'a' contain the letter 'a'. So, the answer is 3.

Now, solve this instance: Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.
Student:
5