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

Example Input: Sentence: 'a woman standing on a beach near the water'. How many words contain the letter 'n' in the sentence.
Example Output: 4

Example Input: Sentence: 'a tv showing a broadcast from the weather channel'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'two zebras standing near rocks behind a fence'. How many words contain the letter 'a' in the sentence.
Example Output:
4