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: 'young lady sitting on a bicycle rickshaw talking on the phone'. How many words start with the letter 's' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a living room with hd tv chair and decorations'. How many words start with the letter 'r' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a tennis player hitting a serve on the court'. How many words start with the letter 't' in the sentence.

Ex Output:

2