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 passenger train that is passing under some blue bars'. How many words start with the letter 'u' in the sentence.
answer:
1


question:
Sentence: 'a tall zebra grazing on a lush green field'. How many words start with the letter 't' in the sentence.
answer:
1


question:
Sentence: 'an umbrella and a table with bottles on top at the beach with boats at the sea'. How many words start with the letter 'a' in the sentence.
answer:

5