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

Example Input: Sentence: 'the facades of the buildings in the row are all the same'. How many words contain the letter 'f' in the sentence.
Example Output: 2

Example Input: 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.
Example Output: 2

Example Input: Sentence: 'two giraffes in the savannah standing next to a tree'. How many words contain the letter 'z' in the sentence.
Example Output:
0