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 hotdogs on a picnic table with soft drinks'. How many words start with the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man putting a protective covering over a large tv screen'. How many words start with the letter 'l' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a very nice motor cycle parked in front of a lawn'. How many words start with the letter 'p' in the sentence.

Ex Output:

1