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

Ex Input:
Sentence: 'a large airplane flying over a dry grass hillside'. How many words contain the letter 'e' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a counter top that has many pots and ingredients on it'. How many words contain the letter 'b' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a boat floats in the water near the shore'. How many words contain the letter 'r' in the sentence.

Ex Output:

3