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

Example Input: Sentence: 'two elephants are standing by the concrete barrier'. How many words contain the letter 'c' in the sentence.
Example Output: 1

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 pretty young lady running towards a tennis ball while holding a tennis racquet'. How many words contain the letter 'e' in the sentence.
Example Output:
5