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

Ex Input:
Sentence: 'a wooden bench sits leveled straight on a slanted ground'. How many words contain the letter 'l' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a picture of some horses and a person in the street'. How many words contain the letter 'r' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'there is an image of a shower in the bathroom'. How many words contain the letter 'n' in the sentence.

Ex Output:

2