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.

[Q]: Sentence: 'there are people in chairs watching a projection screen'. How many words start with the letter 't' in the sentence.
[A]: 1


[Q]: Sentence: 'a guy looks at a tablet and holds his skateboard while riding public transportation'. How many words start with the letter 'l' in the sentence.
[A]: 1


[Q]: Sentence: 'a skateboarder performing tricks under the lights at night'. How many words start with the letter 'u' in the sentence.
[A]:
1