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

Example Input: Sentence: 'a giraffe biting into a tree branch with great ferocity'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'two elephants are standing by the concrete barrier'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'two images show a tennis player in a purple shirt'. How many words contain the letter 'g' in the sentence.
Example Output:
1