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.

Input: Consider Input: Sentence: 'an older airplane flying above buildings and fields'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'some signs buildings trees bushes a green and white sign'. How many words start with the letter 's' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a bunch of bananas hanging from a green tree'. How many words start with the letter 'o' in the sentence.


Output: 1