instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'a green and white street sign on a pole and a light'. How many words contain the letter 's' in the sentence.
answer:
2

question:
Sentence: 'a mother and son holding wii controls in front of a christmas fireplace'. How many words contain the letter 'x' in the sentence.
answer:
0

question:
Sentence: 'a number of fruits at a market'. How many words contain the letter 'd' in the sentence.
answer:
0