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: 'black and white photograph of potted plants and gardening tools'. How many words start with the letter 'a' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'three hotdogs on a picnic table with soft drinks'. How many words start with the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'attractive man smiling standing next to a barrel'. How many words start with the letter 't' in the sentence.

Ex Output:

1