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

Example Input: Sentence: 'a couple sitting on seats on a train'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'this is a portion of a painting showing a banana and an orange'. How many words contain the letter 't' in the sentence.
Example Output: 3

Example Input: Sentence: 'a group of people in a room standing around'. How many words contain the letter 't' in the sentence.
Example Output:
1