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

Ex Input:
Sentence: 'a man paddle boarding in the middle of the ocean'. How many words contain the letter 'i' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a woman standing next to two baby elephants'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two giraffes one of which is eating from a tree'. How many words contain the letter 'b' in the sentence.

Ex Output:

0