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 golfer hitting a golf ball at a hole on the green'. How many words start with the letter 'g' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man covers his ears with his hands as he stands outside a store'. How many words start with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'there is a small vase that has flowers on it'. How many words start with the letter 'i' in the sentence.

Ex Output:

2