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

Ex Input:
Sentence: 'a pile of stuffed brown teddy bears wearing clothing'. How many words contain the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a stir fry consisting of rice broccoli and other vegetables'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a cow in the street of a small foreign town'. How many words contain the letter 'y' in the sentence.

Ex Output:

0