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

Ex Input:
Sentence: 'a picture of a scene in a baseball game'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a little girl sitting on the floor reading a book'. How many words contain the letter 'n' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a couple of traffic lights near a tree'. How many words contain the letter 't' in the sentence.

Ex Output:

3