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

Ex Input:
Sentence: 'a group of bears sitting next to each other on a sidewalk'. How many words contain the letter 't' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a ram standing still in an empty pasture'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'people are flying kites at the beach on a sunny day'. How many words contain the letter 'k' in the sentence.

Ex Output:

1