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

[Q]: Sentence: 'a group of people holding kites walking on a beach'. How many words contain the letter 'x' in the sentence.
[A]: 0


[Q]: Sentence: 'there are some warning signs on a public toilet'. How many words contain the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'airplane food sitting on a display with people looking on'. How many words contain the letter 'g' in the sentence.
[A]:
2