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: 'a group of people eating a meal outside'. How many words start with the letter 'g' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a computer with a farm on the screen on top of a desk'. How many words start with the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a batter that is walking off the field after he struck out'. How many words start with the letter 'a' in the sentence.

Ex Output:

2