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

Ex Input:
Sentence: 'a man sits on a bench with a dog in lap reading'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'three zebras are shown in a black and white photo'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a zebra is standing in the shade at a park'. How many words contain the letter 's' in the sentence.

Ex Output:

3