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

Ex Input:
Sentence: 'a skier posing for a photo in front of a slope'. How many words contain the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'zebra eating from the ground near a tree'. How many words contain the letter 'k' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'birds fly around on the sandy beach  under the clouds'. How many words contain the letter 'p' in the sentence.

Ex Output:

0