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: 'the man is wearing a suit and tie'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a busy train yard packed with trains and tracks'. How many words start with the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a blurry bicycle riders goes by a black car'. How many words start with the letter 'b' in the sentence.

Ex Output:

4