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: 'an office with computer screens a laptop printer and other office accessories'. How many words start with the letter 'a' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a little white airplane that is parked on some concrete'. How many words start with the letter 'p' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man wiping out on a surfboard on a wave'. How many words start with the letter 'o' in the sentence.
[EX A]:
3