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: 'an office with computer screens a laptop printer and other office accessories'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'the men are playing tennis on the court'. How many words start with the letter 'o' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a dog sitting a suitcase filled with clothes'. How many words start with the letter 'f' in the sentence.


Output: 1