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

[Q]: Sentence: 'a large brown dog with a white deflated ball in its mouth'. How many words contain the letter 'm' in the sentence.
[A]: 1


[Q]: Sentence: 'people standing in a river surrounding an elephant some are touching it'. How many words contain the letter 'd' in the sentence.
[A]: 2


[Q]: Sentence: 'a white fence with ivy growing along it and a large tree outside of the fence with a sign on it'. How many words contain the letter 'u' in the sentence.
[A]:
1