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

Ex Input:
Sentence: 'zebra eating from the ground near a tree'. How many words contain the letter 'k' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a woman with long red hair packing herself into a suitcase'. How many words contain the letter 'i' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a computer keyboard sitting on top of a desk'. How many words contain the letter 'o' in the sentence.

Ex Output:

5