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

Ex Input:
Sentence: 'a microwaved broccoli and cheese dish and a spoon'. How many words contain the letter 'n' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a dog jumping up and catching a frisbee in its mouth'. How many words contain the letter 'r' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a beautiful woman playing with a small green bird'. How many words contain the letter 't' in the sentence.

Ex Output:

2