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 man dressed in a suit walking with a crowd of people '. How many words start with the letter 'm' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a lady has just about finished her plate with a knife'. How many words start with the letter 'a' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a bunch of stuffed bears are piled together'. How many words start with the letter 'o' in the sentence.

Ex Output:

1