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 yellow fire hydrant is placed in the grass'. How many words start with the letter 'i' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a person is flying a kite in a field with other people in the distance'. How many words start with the letter 'w' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a black and white cat lying on the back of a sofa'. How many words start with the letter 't' in the sentence.

Ex Output:

1