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

Ex Input:
Sentence: 'a young skateboarder is performing tricks in a driveway'. How many words contain the letter 'd' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'two animals are walking along in a field'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a woman brushing her teeth and a towel on her head'. How many words contain the letter 'u' in the sentence.

Ex Output:

1