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

Ex Input:
Sentence: 'a box filled with fresh fruit and vegetables'. How many words contain the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a gray cat is wearing a santa hat'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a toilet sits in a small rundown room'. How many words contain the letter 'a' in the sentence.

Ex Output:

3