instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'a clock tower next to a building in a city'. How many words contain the letter 'a' in the sentence.
answer:
3


question:
Sentence: 'a white cat sitting on a couch in a den'. How many words contain the letter 'l' in the sentence.
answer:
0


question:
Sentence: 'a man in a ball cap is eating a large sandwich'. How many words contain the letter 'z' in the sentence.
answer:

0