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

Ex Input:
Sentence: 'a man on a boat pets a dog in a life jacket'. How many words contain the letter 'b' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a pizza pie is on a wooden serving tray'. How many words contain the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a small child stirring a pot with a wooden spoon'. How many words contain the letter 'q' in the sentence.

Ex Output:

0