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: 'several ties hang from a bar in a closet'. How many words contain the letter 'e' in the sentence.
answer:
3


question:
Sentence: 'a giraffe biting into a tree branch with great ferocity'. How many words contain the letter 'z' in the sentence.
answer:

0