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

Sentence: 'a bus station full of people walking on the side walk'. How many words contain the letter 'q' in the sentence.
0

Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.
2

Sentence: 'two people are holding a snow board and skies in there hand'. How many words contain the letter 'd' in the sentence.
4