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: 'looking through a detailed window at a clock'. How many words start with the letter 'c' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a car sitting on a train carriage on the tracks'. How many words start with the letter 'a' in the sentence.

Ex Output:

2