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: 'several boxes of glazed donuts on a desk'. How many words start with the letter 'o' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'the bearded man is posing in a suit'. How many words start with the letter 'a' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'keyboard and two monitors showing same background on a desk'. How many words start with the letter 'm' in the sentence.

Ex Output:

1