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

Ex Input:
Sentence: 'a display of bananas on rack with various aisle in background'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'some brown and white goats and a man on some grass'. How many words contain the letter 'o' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a federal express airplane parked on a runway'. How many words contain the letter 'b' in the sentence.

Ex Output:

0