instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'there are trains that are on the train track'. How many words contain the letter 'z' in the sentence.
answer:
0


question:
Sentence: 'some people standing around a line of tennis courts'. How many words contain the letter 'c' in the sentence.
answer:
1


question:
Sentence: 'a line of male cross country skiers on a trail'. How many words contain the letter 'u' in the sentence.
answer:

1