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 bathroom sink and mirror with someone personal belongings on it'. How many words start with the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a group of parked bikes sitting on the side of a road'. How many words start with the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a train makes its way across a bridge in a wooded area'. How many words start with the letter 'a' in the sentence.

Ex Output:

5