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

Example Input: Sentence: 'a batter sings his bat at a baseball game'. How many words contain the letter 'h' in the sentence.
Example Output: 1

Example Input: Sentence: 'a woman with a shopping bag talking on a cell phone'. How many words contain the letter 'e' in the sentence.
Example Output: 2

Example Input: Sentence: 'a street sign sitting above a blue and metal pole'. How many words contain the letter 'o' in the sentence.
Example Output:
2