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 man touching a bird on top of a cage'. How many words start with the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a person with glasses on her head with a french fry in her mouth'. How many words start with the letter 'h' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'people in a field are looking up at a kite'. How many words start with the letter 'u' in the sentence.


Output: 1