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 kitchen with hard wood floors and metallic appliances'. How many words start with the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a couple of kids are sitting in the grass'. How many words start with the letter 'a' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'sailing boats in some water with a tall mountain in the background'. How many words start with the letter 'b' in the sentence.

Ex Output:

2