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.

[Q]: Sentence: 'colorful flowers in a metal vase sitting on a mirror ledge'. How many words start with the letter 'c' in the sentence.
[A]: 1


[Q]: Sentence: 'a man riding skis down the side of a snow covered ski slope'. How many words start with the letter 's' in the sentence.
[A]: 5


[Q]: Sentence: 'a man approaches a subway train arriving at the station'. How many words start with the letter 'a' in the sentence.
[A]:
5