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

Example Input: Sentence: 'a man and a woman sitting in the backseat as the woman talks on a cell phone'. How many words contain the letter 's' in the sentence.
Example Output: 4

Example Input: Sentence: 'two hotdogs on with various toppings and a drink on a counter'. How many words contain the letter 'w' in the sentence.
Example Output: 2

Example Input: Sentence: 'giraffes are roaming freely while the people watch'. How many words contain the letter 't' in the sentence.
Example Output:
2