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 men sitting by tables working on laptops'. How many words contain the letter 'l' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a couple of zebras are standing in a pin'. How many words contain the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a white plate of food including rice and vegetables with beef'. How many words contain the letter 'o' in the sentence.

Ex Output:

2