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

Output: 1


Input: Consider Input: Sentence: 'a fire truck and an ambulance driving down the street'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a person on snow skis is pulling a rope that is attached to something heavy'. How many words start with the letter 'i' in the sentence.


Output: 2