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.

Ex Input:
Sentence: 'two asian men standing next to a no smoking sign'. How many words start with the letter 's' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a man holding a baby two women and two cakes'. How many words start with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a baby that is sitting with a banana'. How many words start with the letter 's' in the sentence.

Ex Output:

1