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

Ex Input:
Sentence: 'a teddy bear that is sitting up on the ground'. How many words contain the letter 'm' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a sleek and pointy fighter jet flying in the sky'. How many words contain the letter 'f' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a dog on a deck ripping in to a plastic frisbee'. How many words contain the letter 'l' in the sentence.

Ex Output:

1