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.

[EX Q]: Sentence: 'a young kid in a hat with a parrot on his shoulder'. How many words start with the letter 'a' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a skateboarder doing a trick at a skate park'. How many words start with the letter 'a' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'there are two polar bears one seems to be smaller than the other'. How many words start with the letter 't' in the sentence.
[EX A]:
5