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: 'the two women were sitting on a blanket beside the river'. How many words start with the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a clock tower is standing next to palm trees'. How many words start with the letter 't' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a dog laying on a couch in a living room'. How many words start with the letter 'o' in the sentence.

Ex Output:

1