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 open fridge that has different items inside of it'. How many words start with the letter 'i' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a bus and two cars are going down a two way street'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a cow standing in the snow near a large city building'. How many words start with the letter 's' in the sentence.

Ex Output:

2