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

Ex Input:
Sentence: 'a piece of half eaten swirl cheesecake on a plate'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a plate has many different types of food on it'. How many words contain the letter 'r' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a larger dog and a smaller dog pull at a frisbee'. How many words contain the letter 'o' in the sentence.

Ex Output:

2