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

[Q]: Sentence: 'some brown and white goats and a man on some grass'. How many words contain the letter 'o' in the sentence.
[A]: 5


[Q]: Sentence: 'a toilet sits in the middle of a street'. How many words contain the letter 'b' in the sentence.
[A]: 0


[Q]: Sentence: 'two cows standing behind a fence with a sign next to it'. How many words contain the letter 'x' in the sentence.
[A]:
1