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

Ex Input:
Sentence: 'a large brown dog with a white deflated ball in its mouth'. How many words contain the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a road cut off by police barricade tape'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man at a desk on a laptop computer'. How many words contain the letter 'w' in the sentence.

Ex Output:

0