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

Ex Input:
Sentence: 'a girl sitting on a bench holding a flower'. How many words contain the letter 'p' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'the two people are in wetsuits in the ocean while one rides a wave'. How many words contain the letter 'd' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'a couple of sheep standing on top of a lush green field'. How many words contain the letter 'p' in the sentence.

Ex Output:
3