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: 'a cake in the shape of a nurses hat written with the words congratulations danielle'. How many words start with the letter 'n' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two people playing frisbee on the beach on a sunny day'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a g pbiole with a sign on top of it'. How many words start with the letter 't' in the sentence.

Ex Output:

1