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: 'two elephants with people riding on them next to block barriers'. How many words start with the letter 'o' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a woman standing next to another woman in front of a tv'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a group of people on bicycles next to a fence'. How many words start with the letter 'o' in the sentence.


Output: 2