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

Ex Input:
Sentence: 'a grey cat sitting in a metal kitchen sink next to cans of soda'. How many words contain the letter 't' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'a laptop is displayed on a small wooden platform'. How many words contain the letter 'k' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'open textbook near a computer keyboard and mouse on a mouse pad'. How many words contain the letter 'a' in the sentence.

Ex Output:

6