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.

Sentence: 'a red car near a fire hydrant with multiple hose slots'. How many words start with the letter 'n' in the sentence.
1

Sentence: 'a horse pulling a carriage with people in the snow'. How many words start with the letter 'a' in the sentence.
2

Sentence: 'a building with many workers and airplanes'. How many words start with the letter 'a' in the sentence.

3