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

Ex Input:
Sentence: 'a living room with couches chairs and tables'. How many words contain the letter 'a' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a person in the air on skis on a mountain slope'. How many words contain the letter 'w' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a white plate topped with donuts covered in chocolate and sprinkles'. How many words contain the letter 'j' in the sentence.

Ex Output:

0