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

Ex Input:
Sentence: 'an untidy room with clothes bottles next to an oven'. How many words contain the letter 'a' in the sentence.

Ex Output:
2


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 pizza on a plate with toppings cut into four slices'. How many words contain the letter 'i' in the sentence.

Ex Output:

5