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: 'two men on motorcycles and wearing helmets'. How many words start with the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a traffic light showing green signalstreet sign board is there'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a white box that is spray painted red with a picture on top'. How many words start with the letter 'i' in the sentence.

Ex Output:

1