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

Example Input: Sentence: 'a car stopped at a red light at an intersection'. How many words contain the letter 'l' in the sentence.
Example Output: 1

Example Input: Sentence: 'a clock tower next to a building in a city'. How many words contain the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'the man in a leather jacket sits near many wine glasses'. How many words contain the letter 'b' in the sentence.
Example Output:
0