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: 'the zebra is walking through the tall brown grass'. How many words start with the letter 't' in the sentence.
4

Sentence: 'a grey cat starring at a hand with a donut'. How many words start with the letter 'a' in the sentence.
4

Sentence: 'a man flying a black and yellow kite'. How many words start with the letter 'a' in the sentence.

3