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: 'a group of dogs standing next to each other while on leashes'. How many words start with the letter 'o' in the sentence.

A: 3
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Q: Sentence: 'a room filled with a stove and surrounded by cabinets'. How many words start with the letter 'w' in the sentence.

A: 1
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Q: Sentence: 'three hotdogs with ketchup and mustard on the bread'. How many words start with the letter 'a' in the sentence.

A:
1
****