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

Ex Input:
Sentence: 'a man showing a piece of hardware he took apart'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'some zebras dirt plants and bushes'. How many words contain the letter 'r' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a young boy sitting on a skate board in the air on a pole'. How many words contain the letter 'x' in the sentence.

Ex Output:

0