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

Example Input: Sentence: 'a train that is pulling into the station'. How many words contain the letter 't' in the sentence.
Example Output: 5

Example Input: Sentence: 'a pair of feet wearing slippers pointed at the floor'. How many words contain the letter 'e' in the sentence.
Example Output: 5

Example Input: Sentence: 'young man in a black and gray swimsuit holding a surfboard'. How many words contain the letter 't' in the sentence.
Example Output:
1