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 bathroom has an overhead shower wand above the tub'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a woman in a black tennis outfit playing tennis on a red clay court'. How many words start with the letter 'r' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a basic bitch drinking iced coffee and holding a doughnut'. How many words start with the letter 'd' in the sentence.

Ex Output:

2