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 couple sitting on seats on a train'. How many words contain the letter 'z' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a lighted clock pointing outwards from a tower'. How many words contain the letter 'k' in the sentence.

Ex Output:

1