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 woman is posing on a floor with a stuffed toy'. How many words start with the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'on one plate there is glazed donut and on the other plate there is mug of hot chocolate with a leaf shape swirled in it'. How many words start with the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a meaty bbq sandwich with lettuce onions and a pickle'. How many words start with the letter 'a' in the sentence.

Ex Output:

3