instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'a couple of zebras are standing in a pin'. How many words contain the letter 'a' in the sentence.
answer:
5


question:
Sentence: 'a sign reading butt street on the corner of a building with a no parking sign below it'. How many words contain the letter 'h' in the sentence.
answer:
2


question:
Sentence: 'a group of people waiting along side a train track for a train'. How many words contain the letter 'f' in the sentence.
answer:

2