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

Ex Input:
Sentence: 'the boy is in batting stance to waiting'. How many words contain the letter 'h' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a clock in the middle of a building'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a chicken sandwich and fries on a table'. How many words contain the letter 'n' in the sentence.

Ex Output:

4