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 smiling woman sits at a table with a pizza and salad'. How many words start with the letter 'a' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a person doing a trick in the water'. How many words start with the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two benches facing away from windows on a cobblestone sidewalk'. How many words start with the letter 't' in the sentence.

Ex Output:

1