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

Ex Input:
Sentence: 'a large dog curls up on the pillow on a bunk bed'. How many words contain the letter 't' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man holding a tennis racquet on a tennis court'. How many words contain the letter 'w' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a clock that is lit up at an information stand of some sort'. How many words contain the letter 'l' in the sentence.

Ex Output:

2