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: 'colorful flowers in a metal vase sitting on a mirror ledge'. How many words start with the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a young blonde drinking wine in a restaurant'. How many words start with the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a boat sitting next to a dock in a body of water'. How many words start with the letter 'a' in the sentence.

Ex Output:

3