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: 'while in a restaurant a young man is playing with his phone'. How many words start with the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a blue bench a house and some bushes'. How many words start with the letter 'b' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'four white sheep are grazing in a field'. How many words start with the letter 'g' in the sentence.


Output: 1