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

[EX Q]: Sentence: 'a person that is flying a hamburger kite'. How many words contain the letter 'b' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a group of people standing together talking '. How many words contain the letter 'b' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'young man jumping to catch frisbee in grassy field'. How many words contain the letter 'r' in the sentence.
[EX A]:
2