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

Ex Input:
Sentence: 'a cat sitting on the arm of a chair'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a rack full of clothes in a small bedroom'. How many words contain the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'three zebras in a field of brown grass'. How many words contain the letter 't' in the sentence.

Ex Output:

1