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

Ex Input:
Sentence: 'a dog lying down with a blanket on top of it'. How many words contain the letter 'o' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a close up of a street sign that is not in english'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man tilts his skateboard to the side with his foot as he sticks his arm out'. How many words contain the letter 'w' in the sentence.

Ex Output:

1