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 black and white cat is sitting on the bathroom sink'. How many words start with the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'fruits and vegetables are on display on a table draped with a red and gold covering'. How many words start with the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a brown dog sitting on top of a dirt field with its tongue hanging out'. How many words start with the letter 'o' in the sentence.

Ex Output:

3