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

Ex Input:
Sentence: 'a bed has an empty bag and folded laundry stacked on it'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a pair of people swimming out to sea on some surfboards'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'three boys playing a soccer game on a green soccer field'. How many words contain the letter 'v' in the sentence.

Ex Output:

0