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

Ex Input:
Sentence: 'a black and white photo of a plane sitting on a runway'. How many words contain the letter 'b' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two zebras standing next to each other in the dried grass'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'two black bears graze by a fence with barbed wire on top'. How many words contain the letter 'z' in the sentence.

Ex Output:

1