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

Ex Input:
Sentence: 'a cat sitting on the arm of a chair'. How many words contain the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a pair of zebras looking towards the camera in a barren field'. How many words contain the letter 'u' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'young children playing soccer in a grassy area with a white soccer ball'. How many words contain the letter 'z' in the sentence.

Ex Output:

0