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

Ex Input:
Sentence: 'a couple of zebras are standing in a pin'. How many words contain the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a bird flying over the water in the ocean shore'. How many words contain the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a woman holds a concernedlooking domestic cat in her arms'. How many words contain the letter 's' in the sentence.

Ex Output:

3