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

Ex Input:
Sentence: 'cows crowd up to a barbed wire fence under a tree'. How many words contain the letter 'n' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of people dressed professionally outside'. How many words contain the letter 'j' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'husband and wife jointly cutting a simple wedding cake'. How many words contain the letter 'n' in the sentence.

Ex Output:

5