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 bus stops in order to pick up passengers'. How many words start with the letter 'p' in the sentence.
2

Sentence: 'a lady has just about finished her plate with a knife'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a group of young men wearing baseball uniforms'. How many words start with the letter 'y' in the sentence.

1