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.

[EX Q]: Sentence: 'two men on motorcycles and wearing helmets'. How many words start with the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'an older airplane flying above buildings and fields'. How many words start with the letter 'a' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'man at a restaurant with a piece of pastry stuffed in his mouth'. How many words start with the letter 'o' in the sentence.
[EX A]:
1