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

Ex Input:
Sentence: 'a lit street light next to a bar'. How many words contain the letter 'w' in the sentence.

Ex Output:
0


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: 'a pizza sitting on top of a metal rack in an oven'. How many words contain the letter 's' in the sentence.

Ex Output:

1