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: 'an office with computer screens a laptop printer and other office accessories'. How many words start with the letter 'a' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a desk with a cross on it and candles'. How many words start with the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'the zebra is walking through the tall brown grass'. How many words start with the letter 't' in the sentence.

Ex Output:

4