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 large ceramic ornament is surrounded by a flower bed and several flowers bushes and shrubs on a bright cloudy day'. How many words start with the letter 'f' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'the bearded man is posing in a suit'. How many words start with the letter 'a' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a baseball player in a uniform swinging his bat'. How many words start with the letter 'b' in the sentence.

Ex Output:

2