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

Ex Input:
Sentence: 'a crowd of people walking around a city street'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'cars parked on the side of the road beside a fire hydrant'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a white bed with a rucksack and bag on it'. How many words contain the letter 'x' in the sentence.

Ex Output:

0