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

Example Input: Sentence: 'a soldier holds something for a young bear'. How many words contain the letter 'a' in the sentence.
Example Output: 3

Example Input: Sentence: 'a person standing in the kitchen with an object in hand'. How many words contain the letter 't' in the sentence.
Example Output: 5

Example Input: Sentence: 'a picture of a street with a lot of stores'. How many words contain the letter 'j' in the sentence.
Example Output:
0