instruction:
In this task, you need to count the number of words in a sentence that start with the given letter. Answer with numbers and not words.
question:
Sentence: 'a man riding a skateboard at a skate park'. How many words start with the letter 'r' in the sentence.
answer:
1


question:
Sentence: 'this photo shows four copies of the same fire hydrant'. How many words start with the letter 't' in the sentence.
answer:
2


question:
Sentence: 'a tour bus passing a building with a clock tower and wind indicator'. How many words start with the letter 'a' in the sentence.
answer:

4