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: 'three hot dogs are stuffed in buns are ready to serve'. How many words start with the letter 'd' in the sentence.
1

Sentence: 'a group of parked bikes sitting on the side of a road'. How many words start with the letter 'o' in the sentence.
3

Sentence: 'children are reaching for ingredients to make a pizza'. How many words start with the letter 'r' in the sentence.

1