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

Ex Input:
Sentence: 'two people riding on the back of a large elephant'. How many words contain the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'an old motorcycle with the seat missing parked in a garage with other parts and motorcycles'. How many words contain the letter 'r' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'a group of cows are eating grass in the pasture'. How many words contain the letter 'a' in the sentence.

Ex Output:

5