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: 'man in winter clothes riding a snowboard on a gentle slope'. How many words start with the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'there are people in chairs watching a projection screen'. How many words start with the letter 't' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a yellow fire hydrant is shown on the sidewalk'. How many words start with the letter 'a' in the sentence.

Ex Output:

1