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 giraffe is standing behind a stone wall'. How many words start with the letter 'a' in the sentence.
2

Sentence: 'some unfinished looking wood is in a white bathroom'. How many words start with the letter 'w' in the sentence.
2

Sentence: 'a girl and a boy are playing with a wii'. How many words start with the letter 'a' in the sentence.

5