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

[Q]: Sentence: 'a woman standing in the dirt looking up at an elephant'. How many words contain the letter 'b' in the sentence.
[A]: 0


[Q]: Sentence: 'multiple birds on the ground in a parking lot'. How many words contain the letter 'm' in the sentence.
[A]: 1


[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