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 bowl of noodles is pictured on a table with eating utensils'. How many words start with the letter 'p' in the sentence.

Ex Output:
1

Ex Input:
Sentence: 'while in a restaurant a young man is playing with his phone'. How many words start with the letter 'w' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a man holding a nintendo wii game controller in a living room'. How many words start with the letter 'r' in the sentence.

Ex Output:
1