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

Ex Input:
Sentence: 'two giraffe a mom and baby both with their heads up'. How many words contain the letter 'w' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a group of giraffes walk across an open area'. How many words contain the letter 'm' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a man poses leaning against a refrigerator with an empty box in front of him'. How many words contain the letter 'j' in the sentence.

Ex Output:
0