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 Input:
Sentence: 'giraffe brought in ground next to some trees in exhibit'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'the passengers are going up the step in to the plane'. How many words start with the letter 't' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a man with a bushy beard and green tie'. How many words start with the letter 'm' in the sentence.

Ex Output:

1