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

Ex Input:
Sentence: 'a lighthouse with birds flying by it at a bay'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a man buttering toast in his kitchen on the counter'. How many words contain the letter 'c' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'this is an image of a man playing tennis'. How many words contain the letter 'k' in the sentence.

Ex Output:

0