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

Ex Input:
Sentence: 'a clothing line with teddy bears hung by their ears'. How many words contain the letter 'n' in the sentence.

Ex Output:
3

Ex Input:
Sentence: 'a man sitting holding a drink with pizzas on the table'. How many words contain the letter 'k' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'food steaming machine on the shelf of a store'. How many words contain the letter 'o' in the sentence.

Ex Output:
4