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

Ex Input:
Sentence: 'a giraffe walking in the grass near a building'. How many words contain the letter 'd' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a person in a helmet riding a skateboard'. How many words contain the letter 'c' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'the well furnished room has many large rugs'. How many words contain the letter 'r' in the sentence.

Ex Output:

4