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

Q: Sentence: 'a tree by a house has a traffic sign attached to it'. How many words contain the letter 'm' in the sentence.

A: 0
****
Q: Sentence: 'a apple that is sitting on top of a knife'. How many words contain the letter 'u' in the sentence.

A: 0
****
Q: Sentence: 'a group of people sitting at a table having a meal together'. How many words contain the letter 'b' in the sentence.

A:
1
****