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: 'two men are flying kites in a field in front of a parking lot'. How many words start with the letter 'f' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a yellow fire hydrant is placed in the grass'. How many words start with the letter 'i' in the sentence.

Ex Output:
2


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