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 group of cows that are standing in the grass'. How many words start with the letter 'i' in the sentence.
1

Sentence: 'the passengers are going up the step in to the plane'. How many words start with the letter 't' in the sentence.
4

Sentence: 'a group of people standing outside of a building with a bike'. How many words start with the letter 'b' in the sentence.

2