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 person with a hoodie on looking at a laptop'. How many words start with the letter 'l' in the sentence.

Ex Output:
2


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 group of horses stand in a field next to a train'. How many words start with the letter 'a' in the sentence.

Ex Output:

3