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

Sentence: 'watchful raptor standing on one foot on a rock pile'. How many words contain the letter 'r' in the sentence.
2

Sentence: 'man holding remote control for video game system'. How many words contain the letter 'u' in the sentence.
0

Sentence: 'a giraffe standing in a grassy field near other animals'. How many words contain the letter 'n' in the sentence.

4