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

Ex Input:
Sentence: 'a woman is smiling next to a dog'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a fresh flower on a table in a piture of water'. How many words contain the letter 'n' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a row of sailboats docked on a ledge'. How many words contain the letter 's' in the sentence.

Ex Output:

1