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 small airplane sitting on top of a runway'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a man sitting on the floor of a living room while a child stands on a snowboard next to him'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'people sitting on lawn chairs under multicolored umbrellas'. How many words start with the letter 'm' in the sentence.


Output: 1