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: 'some nice decorations left on a window pane'. How many words start with the letter 'l' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a man cuts into food being cooked on a grill'. How many words start with the letter 'o' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'several people watch cars drive by with bikes on them'. How many words start with the letter 'b' in the sentence.

Ex Output:

2