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: 'three people in suits are standing and holding surfboards'. How many words start with the letter 's' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a woman is standing in the kitchen using her phone'. How many words start with the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'there is a small plate of food and a glass of whine next to it'. How many words start with the letter 'o' in the sentence.

Ex Output:

2