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

Ex Input:
Sentence: 'a group of people on skis on a snowy slope'. How many words contain the letter 'w' in the sentence.

Ex Output:
1


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: 'a close up of a plate of food with french fries'. How many words contain the letter 'o' in the sentence.

Ex Output:

4