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

Ex Input:
Sentence: 'a man in a restaurant makes the v sign with both hands'. How many words contain the letter 'n' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a display of bananas on rack with various aisle in background'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the beach has six open umbrellas on poles'. How many words contain the letter 'g' in the sentence.

Ex Output:

0