instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.
answer:
4

question:
Sentence: 'a picture of some horses and a person in the street'. How many words contain the letter 'r' in the sentence.
answer:
4

question:
Sentence: 'a group of people on wet suits sitting on surfboards in the ocean'. How many words contain the letter 'c' in the sentence.
answer:
1