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: 'post it notes scissors and glue stick on a table'. How many words start with the letter 's' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a traffic light with a red light and an arrow pointing to the right'. How many words start with the letter 't' in the sentence.

Ex Output:
3


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