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

Ex Input:
Sentence: 'a woman riding a motorcycle down a busy city street'. How many words contain the letter 'w' in the sentence.

Ex Output:
2


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 time lapse image of a snowboarder jumping off a ramp onto a snowy mountain'. How many words contain the letter 'e' in the sentence.

Ex Output:

4