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 skis down the side of a snow covered ski slope'. How many words start with the letter 's' in the sentence.
answer:
5


question:
Sentence: 'a rusty metal park bench in a park'. How many words start with the letter 'a' in the sentence.
answer:
2


question:
Sentence: 'a double decker bus on a street'. How many words start with the letter 's' in the sentence.
answer:

1