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.

Q: Sentence: 'an older airplane flies over the country side'. How many words start with the letter 'o' in the sentence.

A: 2
****
Q: Sentence: 'a tall giraffe kissing the bark of a brown tree'. How many words start with the letter 'a' in the sentence.

A: 2
****
Q: Sentence: 'a man on a surf board holding on to a sail in the ocean'. How many words start with the letter 'o' in the sentence.

A:
3
****