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

Example Input: Sentence: 'a basket that is full of fruits and vegetables'. How many words contain the letter 'v' in the sentence.
Example Output: 1

Example Input: Sentence: 'cows crowd up to a barbed wire fence under a tree'. How many words contain the letter 'n' in the sentence.
Example Output: 2

Example Input: Sentence: 'a large clock tower near a bridge on a stone wall'. How many words contain the letter 'n' in the sentence.
Example Output:
3