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 young girl wearing a pink tie and glasses'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'three hotdogs on a picnic table with soft drinks'. How many words start with the letter 'w' in the sentence.
1

Sentence: 'a person standing in a corridor holding an umbrella'. How many words start with the letter 'a' in the sentence.

3