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

[Q]: Sentence: 'five sheep out in an open field eating straw'. How many words contain the letter 'd' in the sentence.
[A]: 1

[Q]: Sentence: 'a white biplane on grassy area next to buildings'. How many words contain the letter 'g' in the sentence.
[A]: 2

[Q]: Sentence: 'a couple of pictures of a cat sleeping on a hair brush'. How many words contain the letter 'l' in the sentence.
[A]:
2