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

Ex Input:
Sentence: 'a couple is fast asleep at 3 in the morning'. How many words contain the letter 'y' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a hotel room with a nice tv and sofa setup'. How many words contain the letter 'i' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a group of skiers practice going down a small hill'. How many words contain the letter 'i' in the sentence.

Ex Output:

4