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: 'a person that is fixing a pillow on a couch'. How many words contain the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman in an evening dress and fur stole standing next to a man with a button up shirt and tie next to a red curtain'. How many words contain the letter 's' in the sentence.

Ex Output:

4