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


[Q]: Sentence: 'a passanger train is coming down the tracks'. How many words start with the letter 't' in the sentence.
[A]: 3


[Q]: Sentence: 'a fire truck is parked outside of a red tall building'. How many words start with the letter 'o' in the sentence.
[A]:
2