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

[Q]: Sentence: 'martha stewart holding a fluffy siamese cat on her arms'. How many words contain the letter 'a' in the sentence.
[A]: 6


[Q]: Sentence: 'two men and two men having drinks at a bar'. How many words contain the letter 'g' in the sentence.
[A]: 1


[Q]: Sentence: 'a passenger train full of people comming down the track'. How many words contain the letter 'u' in the sentence.
[A]:
1