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 very large pizza with pepperoni and olives and someone taking  massive slice'. How many words start with the letter 'l' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a counter topped with vases in front of a window'. How many words start with the letter 'w' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'tree is a male skateboarder that is riding a ramp'. How many words start with the letter 'r' in the sentence.

Ex Output:

2