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

Ex Input:
Sentence: 'a man that is sitting at a table with a bowl'. How many words contain the letter 'k' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a fire hydrant on the side of the road near a building'. How many words contain the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'white plate filled with broccoli potatoes and mango'. How many words contain the letter 'r' in the sentence.

Ex Output:

1