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 scooter with a bag on it parked next to a pasture with two cows in it'. How many words start with the letter 'i' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a colorful kite flies over top a house'. How many words start with the letter 'f' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a birthday cake is covered with partially melted candles'. How many words start with the letter 'c' in the sentence.

Ex Output:

3