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 woman is holding some cupcakes with candles and a kitchen and a baby in a chair'. How many words start with the letter 'k' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'three chefs talking to each other at a bar'. How many words start with the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a clock on the side of a building extending over a street'. How many words start with the letter 'a' in the sentence.

Ex Output:

3