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.
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Question: Sentence: 'dusty train passing through a dry mountain valley'. How many words start with the letter 'd' in the sentence.

Answer: 2

Question: Sentence: 'parking meter with nine minutes left and red car'. How many words start with the letter 'c' in the sentence.

Answer: 1

Question: Sentence: 'two birds sitting on a tree stump side by side'. How many words start with the letter 's' in the sentence.

Answer:
4