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

Example Input: Sentence: 'some kids are all taking a photograph together'. How many words contain the letter 'e' in the sentence.
Example Output: 3

Example Input: Sentence: 'a bunch of white hyacinths arranged in a vase'. How many words contain the letter 'r' in the sentence.
Example Output: 1

Example Input: Sentence: 'there are two elephants standing together in the dirt'. How many words contain the letter 'k' in the sentence.
Example Output:
0