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

Example Input: Sentence: 'a large airplane flying over a dry grass hillside'. How many words contain the letter 'e' in the sentence.
Example Output: 4

Example Input: Sentence: 'a soldier holds something for a young bear'. How many words contain the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'man sitting in a chair with a remote in his hand'. How many words contain the letter 'u' in the sentence.
Example Output:
0