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: 'a man and luggage carts outside of an airplane'. How many words start with the letter 'o' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'three motorcycle police in front of a crowd attending an outdoor summer event with beer truck behind them'. How many words start with the letter 'p' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a man stands near a car in front of a herd of cattle in a large pasture'. How many words start with the letter 'i' in the sentence.


Output: 2