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

Ex Input:
Sentence: 'a woman with a green umbrella crosses the wet street'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'two green metal street signs with spanish words on it'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a frozen pizza box is has four cheese label'. How many words contain the letter 'r' in the sentence.

Ex Output:

2