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

[Q]: Sentence: 'a modern looking bathroom has a toilet and a sink'. How many words contain the letter 'o' in the sentence.
[A]: 4


[Q]: Sentence: 'cows crowd up to a barbed wire fence under a tree'. How many words contain the letter 'n' in the sentence.
[A]: 2


[Q]: Sentence: 'a red stop sign sitting above a three way sign'. How many words contain the letter 'd' in the sentence.
[A]:
1