instruction:
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.
question:
Sentence: 'a crowd of people on the street one of which is taking pictures with a cell phone'. How many words start with the letter 'o' in the sentence.
answer:
4


question:
Sentence: 'a couple of men shaking hands next to a wooden table'. How many words start with the letter 'a' in the sentence.
answer:
2


question:
Sentence: 'a man holding onto luggage standing next to a train'. How many words start with the letter 'n' in the sentence.
answer:

1