In this task, you need to count the number of words in a sentence that contain the given letter

Example Input: Sentence: 'a large herd of farm animals are with a cowboy'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a little girl sitting on the floor reading a book'. How many words contain the letter 'n' in the sentence.
Example Output: 3

Example Input: Sentence: 'two zebras in a park filled with trees'. How many words contain the letter 't' in the sentence.
Example Output:
3