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

Example Input: Sentence: 'a large truck driving on a crowded street'. How many words contain the letter 'i' in the sentence.
Example Output: 1

Example Input: Sentence: 'an untidy room with clothes bottles next to an oven'. How many words contain the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'a small elephant tugs on a larger elephants tusk'. How many words contain the letter 'f' in the sentence.
Example Output:
0