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

Ex Input:
Sentence: 'a man in a blue shirt and ear piece holds a clip board'. How many words contain the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a woman on crosscountry skiing through a wooded trail'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'dead flowers in a vase sitting on the ground'. How many words contain the letter 'l' in the sentence.

Ex Output:

1