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

Ex Input:
Sentence: 'a large truck driving on a crowded street'. How many words contain the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a brown bear standing next to a giant rock'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a crowd of people flying kites near the capitol building'. How many words contain the letter 'a' in the sentence.

Ex Output:

3