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 light shines on five clocks showing times in different zones'. How many words start with the letter 'f' in the sentence.
1

Sentence: 'a man riding on top of a wave on a surfboard'. How many words start with the letter 'o' in the sentence.
3

Sentence: 'an older woman is swinging a tennis racquet at a ball'. How many words start with the letter 's' in the sentence.

1