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

Ex Input:
Sentence: 'a ram standing still in an empty pasture'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a horse and a donkey stand in a fenced field'. How many words contain the letter 'd' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a person that is laying in the snow'. How many words contain the letter 'n' in the sentence.

Ex Output:

4