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 woman wearing gloves that has a kite'. How many words start with the letter 't' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a boat floating on a lake next to a shore filled with buildings'. How many words start with the letter 'n' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man serving a tennis ball on top of a tennis court'. How many words start with the letter 'b' in the sentence.

Ex Output:

1