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

Ex Input:
Sentence: 'a name and clock lit up at night'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'some brown and white goats and a man on some grass'. How many words contain the letter 'o' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'the pitcher first baseman and shortstop are reacting to what the batter did'. How many words contain the letter 'r' in the sentence.

Ex Output:

6