instruction:
In this task, you need to count the number of words in a sentence that contain the given letter
question:
Sentence: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.
answer:
3


question:
Sentence: 'man holding remote control for video game system'. How many words contain the letter 'u' in the sentence.
answer:
0


question:
Sentence: 'two pictures of a plate of food and a person'. How many words contain the letter 'a' in the sentence.
answer:

4