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

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 white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a very pretty horse sticking its head out of a barn'. How many words contain the letter 'p' in the sentence.

Ex Output:

1