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

Ex Input:
Sentence: 'the facades of the buildings in the row are all the same'. How many words contain the letter 'f' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman sitting in a chair next to a tea table in the woods'. How many words contain the letter 'i' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'an airplane is flying through the pretty blue sky'. How many words contain the letter 'f' in the sentence.

Ex Output:

1