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: 'young lady sitting on a bicycle rickshaw talking on the phone'. How many words start with the letter 's' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a group of people sitting at a long table in  a wine cellar'. How many words start with the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a toilet sitting in a bathroom next to a sink'. How many words start with the letter 's' in the sentence.


Output: 2