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: 'different cars on the streets in a city setting'. How many words start with the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a white kitchen has green and lime accents'. How many words start with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a street pole with some signs sitting on them'. How many words start with the letter 's' in the sentence.

Ex Output:

4