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 guy preforming a skateboard trick at a skate park'. How many words start with the letter 'a' in the sentence.
4

Sentence: 'a mirror a sink a toilet and a blue basket'. How many words start with the letter 'a' in the sentence.
5

Sentence: 'a view of a building in a country different than the us'. How many words start with the letter 'i' in the sentence.
1