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 man that is playing a wii in a living room'. How many words start with the letter 'i' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a picture of a mirror on a bike'. How many words start with the letter 'o' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'the young child is standing by the fence outside'. How many words start with the letter 'c' in the sentence.

Ex Output:

1