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

[Q]: Sentence: 'a sidewalk with a toilet laying on side with people in background'. How many words contain the letter 'o' in the sentence.
[A]: 4


[Q]: Sentence: 'a group of people dressed to ski standing in the snow'. How many words contain the letter 'b' in the sentence.
[A]: 0


[Q]: Sentence: 'a bus with a horse painted on the side'. How many words contain the letter 'o' in the sentence.
[A]:
2