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 lone zebra standing in the middle of a field'. How many words start with the letter 'i' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a living room filled with a brown chair and couch'. How many words start with the letter 'c' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a close up of a person holding a sandwich'. How many words start with the letter 'p' in the sentence.

Ex Output:

1