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

Ex Input:
Sentence: 'a black and white photo of a very crowded tropical beach'. How many words contain the letter 'p' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a kitchen with a dining room table and a sitting area'. How many words contain the letter 'r' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman walks alone through the old european city'. How many words contain the letter 'd' in the sentence.

Ex Output:

1