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: 'the inside of a toilet stall on an airplane'. How many words start with the letter 'a' in the sentence.

A: 3
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Q: Sentence: 'a man wiping out on a surfboard on a wave'. How many words start with the letter 'o' in the sentence.

A: 3
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Q: Sentence: 'the two people are holding skis and a sign'. How many words start with the letter 'a' in the sentence.

A:
3
****