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

Example Input: Sentence: 'the zebra is showing his rear end to the camera'. How many words contain the letter 'r' in the sentence.
Example Output: 3

Example Input: Sentence: 'a street scene with cars and an city bus'. How many words contain the letter 's' in the sentence.
Example Output: 4

Example Input: Sentence: 'a man sitting at a table with a plate of food and a cup'. How many words contain the letter 'h' in the sentence.
Example Output:
1