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: 'person in profile and sunlight at a barred window'. How many words start with the letter 'a' in the sentence.
3

Sentence: 'a lone zebra standing in the middle of a field'. How many words start with the letter 'i' in the sentence.
1

Sentence: 'the clock is located above the high arch'. How many words start with the letter 't' in the sentence.

2