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

Example Input: Sentence: 'a pair of feet wearing slippers pointed at the floor'. How many words contain the letter 'e' in the sentence.
Example Output: 5

Example Input: Sentence: 'a white plate of food including rice and vegetables with beef'. How many words contain the letter 'o' in the sentence.
Example Output: 2

Example Input: Sentence: 'a pair of cows hanging out in a lush field'. How many words contain the letter 'b' in the sentence.
Example Output:
0