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 girl who is wearing a back pack with a teddy bear in it'. How many words start with the letter 'w' in the sentence.
answer:
3


question:
Sentence: 'several people are playing frisbee in a park'. How many words start with the letter 'a' in the sentence.
answer:
2


question:
Sentence: 'two buses parked in the lot at a bus station'. How many words start with the letter 'a' in the sentence.
answer:

2