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 on a surfboard in the midst of an ocean wave'. How many words start with the letter 'o' in the sentence.
answer:
3


question:
Sentence: 'several people are playing frisbee in a park'. How many words start with the letter 'a' in the sentence.
answer:
2


question:
Sentence: 'a black cow standing in a grassy field'. How many words start with the letter 'a' in the sentence.
answer:

2