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

Ex Input:
Sentence: 'child standing in front of a stop sign on a suburban street corner'. How many words contain the letter 'u' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a vase picture and a bird statue on a table'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'two men very close to a black bear'. How many words contain the letter 'd' in the sentence.

Ex Output:

0