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

Ex Input:
Sentence: 'an elephant standing on a green grass area'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'green bananas or plantains hang in a bunch on a tree'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a picture of a teddy bear on a bicycle'. How many words contain the letter 'w' in the sentence.

Ex Output:

0