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

[Q]: Sentence: 'a man in a suit with his finger in his ear'. How many words contain the letter 'm' in the sentence.
[A]: 1


[Q]: Sentence: 'a man on a boat pets a dog in a life jacket'. How many words contain the letter 'b' in the sentence.
[A]: 1


[Q]: Sentence: 'several cars and a truck moving along in traffic on a highway'. How many words contain the letter 'n' in the sentence.
[A]:
5