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 car sitting on a train carriage on the tracks'. How many words start with the letter 'a' in the sentence.
answer:
2


question:
Sentence: 'person surfing in the sea on the surfboard'. How many words start with the letter 's' in the sentence.
answer:
3


question:
Sentence: 'a pair of scissors and a comb sitting on a piece of wood'. How many words start with the letter 'a' in the sentence.
answer:

4