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

Ex Input:
Sentence: 'a child on the sand and a boat and some water'. How many words contain the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a picture of a plane in the air'. How many words contain the letter 'l' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a maze of off ramps and highway lanes is featured with a large yellow traffic sign'. How many words contain the letter 'j' in the sentence.

Ex Output:

0