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: 'birds are standing in a row on a wooden railing'. How many words start with the letter 'a' in the sentence.
answer:
3


question:
Sentence: 'a boy wearing blue has a skateboard in the air near a black railing'. How many words start with the letter 'a' in the sentence.
answer:
4


question:
Sentence: 'a cat is sitting on the living room floor'. How many words start with the letter 'o' in the sentence.
answer:

1