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 group of dogs standing next to each other while on leashes'. How many words start with the letter 'o' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a cow that is standing in the grass'. How many words start with the letter 't' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a pineapple pizza that has a quarter missing'. How many words start with the letter 'm' in the sentence.

Ex Output:

1