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: 'woman standing on the beach with a large sailboat behind her'. How many words start with the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a tennis player walking off the court'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a family happily eats together with smile son their faces'. How many words start with the letter 'a' in the sentence.

Ex Output:

1